A vacuum pumping system for the die cavity of a die-casting mold

Abstract

The present invention discloses a die-casting mold cavity vacuum pumping system, belonging to the technical field of mold vacuum pumping. It mainly aims at the problem that the filtering structure in the vacuum pipeline of existing products needs to be frequently maintained, and proposes the following technical solutions, including several mold bodies with cavities and a negative pressure pumping device for negative pressure pumping. Among them, the mold body and the negative pressure pumping device are connected through a pipeline. The present invention realizes the filtration of the pumped gas during the vacuum pumping of the cavity by adding a gas filtering component on the mold body, and as the vacuum channel is blocked, the impurity removal mesh plate in the gas filtering component slides out, and the impurity removal mesh plate is cleaned by means of the pumping effect of the negative pressure pumping device, so as to not only realize the filtration of the pumped gas, but also avoid the replacement and maintenance of the filtering structure, reduce the burden on the staff, reduce the maintenance cost, and cancel the individually arranged vacuum pumping device on the mold body, reducing the layout cost of the product.

Description

Technical Field

[0001] The present invention relates to the technical field of die-casting mold vacuum pumping, and particularly to a vacuum pumping system for a die-casting mold cavity. Background Art

[0002] Die-casting forming is a forming process in which liquid metal fills the mold cavity at an extremely 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 escape and is inevitably involved in the molten metal and remains in the die-cast part in the form of pores, resulting in relatively serious pore defects in the die-cast part, and there are certain problems with the internal quality of the product. In order to improve the internal quality of the product in die-casting forming technology and avoid most of the gas in the cavity being involved in the molten metal to form pores and remain in the die-cast part during die-casting, generally, vacuum pumping treatment is carried out on the die-casting mold cavity.

[0003] There is a Chinese patent with an authorized announcement number of CN104209492B, which discloses a vacuum pumping system for a die-casting mold cavity. It includes several die-casting molds, an inlet 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 cylinder, and the piston rod is connected to a driving mechanism. A vacuum cut-off valve is arranged between the vacuum pumping channel and the inlet channel.

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

[0005] Dust and residual water vapor in the mold cavity will be sucked into the vacuum pumping pipeline due to the vacuum negative pressure in the vacuum pumping pipeline. The traditional method is to connect a dust particle filter to the vacuum pumping pipeline. However, as the number of uses increases, these dust and water vapor will slowly move into the filter element, and over time, the filter element will be blocked, thus requiring frequent manual replacement of the filter element to ensure the vacuum pumping effect. Furthermore, it will not only affect the production efficiency but also increase the maintenance cost of the dust particle filter;

[0006] Although the individually configured vacuum pumping devices on multiple die-casting molds can ensure the vacuum pumping operation of a single die-casting mold after being connected in series with the vacuum suction equipment, the multiple individually configured vacuum pumping devices increase the equipment layout cost and are not conducive to the popularization and use of the equipment. Summary of the Invention

[0007] To overcome the above-mentioned defects of the prior art, the present invention provides a die-casting mold cavity vacuum pumping system. By adding a gas filtering component to the mold body, the gas sucked during the vacuum pumping of the mold cavity can be filtered. As the vacuum channel is blocked, the impurity removal mesh plate in the gas filtering component slides out, and the automatic cleaning of the impurity removal mesh plate is realized by means of the suction effect of the negative pressure pumping device. Thus, not only the filtering of the sucked gas is realized, but also the replacement and maintenance of the filtering structure are avoided, the burden on the staff is reduced, the maintenance cost is lowered, the production efficiency of the product is guaranteed, and the single-set vacuum pumping device on the mold body is cancelled, 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 includes a plurality of mold bodies with mold cavities and a negative pressure pumping device for negative pressure pumping. Among them, the mold body and the negative pressure pumping device are connected by a pipeline. A blocking mechanism is provided at the bottom of each mold body, and a gas filtering component for connecting the pipeline is installed on the side wall of the mold body. The mold body includes a fixed mold and a movable mold that are closed up and down. Among them, receiving grooves are opened on both inner walls of the fixed mold. A blocking block is slidably connected in the receiving groove, and a through hole is opened on the bottom shell wall of the receiving groove. A rectangular channel penetrating the corresponding side wall of the fixed mold is opened at the top of the left receiving groove for serving as a vacuum channel, and a notch penetrating the corresponding side wall of the fixed mold is opened at the top of the right receiving groove, and this notch is used for serving 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 provided 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. An impurity removal mesh plate for filtering gas impurities is provided on the right side of the impeller. A filter net for ventilation is provided on the right side of the impurity removal mesh plate. A blocking plate for covering is provided on the filter net. A bottom cover mechanism is installed around the bottom of the filter net. The impeller and the bottom cover mechanism are linked by an adjusting arm. Driving mechanisms are provided on the front and rear sides of the impurity removal mesh plate and are located inside the box body.

[0011] A wedge-shaped frame is provided at the top of the left blocking block. The wedge-shaped frame is composed of a straight plate and a wedge-shaped plate. Among them, there are two wedge-shaped plates, which are symmetrically arranged front and back on the top of the straight plate, 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 plugging mechanism includes a bottom plate located below the mold body. The bottom plate is supported by support columns between the fixed mold, and a swing arm is movably connected to the top of the bottom plate. Both ends of the swing arm are movably connected with splicing rods. The tops of multiple splicing rods respectively penetrate through corresponding through holes and are installed on corresponding plugging blocks, and a limiting ring for limiting is threadedly connected to the splicing rods;

[0014] There are four support columns, which are respectively 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 outer wall of the bottom of the fixed mold by screws;

[0015] A U-shaped frame is movably connected to the swing arm through a pin shaft. The bottom of the U-shaped frame is fixedly connected to the center of the top of the bottom plate. Return grooves are opened at both ends of the swing arm. The splicing rod is movably connected to the return groove through a pin shaft. A compression spring is installed on the bottom shell wall of the swing arm directly below each splicing rod, and the bottom end of the compression spring is fixedly connected to the bottom plate.

[0016] L-shaped plates are integrally arranged on the front and rear inner walls of the box body. The setting of the two L-shaped plates makes a ventilation area and a working area formed inside the box body. Among them, there are two working areas, located on both sides of the ventilation area. A partition plate is arranged between the two L-shaped plates in the ventilation area, and this partition plate is used to strengthen the stability of the internal space of the box body;

[0017] The impurity removal mesh plate is located directly below the partition plate, and the bottom of the impurity removal mesh plate penetrates 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 opened on the right side of the impurity removal mesh plate on the bottom shell wall of the box body. The filter screen is arranged in the notch. The plugging plate is installed above the notch through a connecting shaft. Among them, both 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. A wing plate for pressing the plugging plate is installed on the right shell wall of the impurity removal mesh plate;

[0019] The impeller is composed of a transmission shaft and blades. Among them, both ends of the transmission shaft respectively penetrate through the corresponding side walls of the hemispherical box and are installed with end caps. There are multiple 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. Among them, a reciprocating thread is opened on the part of the transmission shaft extending outside the hemispherical box, and an internal thread ring is threadedly connected to the reciprocating thread. The internal thread ring is slidably connected to the box body, and multiple adjusting arms are respectively fixedly connected to the corresponding internal thread rings.

[0020] The two driving mechanisms are respectively arranged in corresponding working areas. Among them, the driving mechanism includes guide rods symmetrically arranged up and down inside the working area. A carrier plate is sleeved on the two guide rods together. 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 groove is formed in the right shell wall of the L-shaped plate. An extension arm is movably connected in the through groove. 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 is provided with a contact rod. The other end of the contact rod is in movable contact with a wedge-shaped frame. A regulating component for adjusting the impurity removal mesh plate is arranged on the left side of the carrier plate;

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

[0022] The regulating component includes a rotating shaft rotatably connected to the inner wall of the L-shaped plate through a bearing. A gear and a cam are installed on the rotating shaft. Among them, the cam is located at the end of the rotating shaft, and a rack meshing with the cam is arranged below the cam. The right end of the rack is fixedly connected to the corresponding carrier plate;

[0023] A through passage groove is formed below the rotating shaft on the corresponding side wall of the L-shaped plate. A convex rod is movably connected in the through passage groove. One end of the convex rod is fixedly connected to the corresponding side wall of the impurity removal mesh 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 formed on the peripheral wall of the cam. A slider is slidably connected in the annular groove. The top end of the cam is fixedly connected to the slider.

[0025] A cleaning component for impurity cleaning is arranged below the filter screen. The cleaning component includes sliding grooves formed on both sides of the filter screen. Sliding blocks are slidably connected in the sliding grooves. A cleaning plate for cleaning the filter screen is jointly installed at the bottoms of the two sliding blocks. Secondary plates are installed on the front and rear side shell walls of the cleaning plate. Oblique grooves are formed in the secondary plates. Slide rods are slidably connected in the oblique grooves.

[0026] The bottom cover mechanism is composed of a bottom cover and a vibration component. Among them, the bottom cover includes a cover body installed on the outer wall of the bottom of the box body by screws. Movement rods are movably connected to the front and rear side shell walls of the cover body respectively. The ends of the movement rods extending into the interior of the cover body are fixedly connected to the corresponding slide rods respectively, and the other ends of the movement rods are fixedly connected to the corresponding adjusting arms by screws.

[0027] The vibration assembly includes auxiliary frames located on the outer walls of the front and rear sides of the cover body. A bent rod is movably connected to the auxiliary frame. The right ends of multiple bent rods are commonly connected to an integration plate. A plurality of knocking rods located on the integration plate are arranged between two bent rods. The knocking rods are used to knock the corresponding side walls of the cover body. A vibration spring located on the corresponding bent rod is sleeved between each auxiliary frame and the integration plate. A pressing frame located on the corresponding adjusting arm is arranged on the left side of each bent rod. Wherein, a spherical ball is rotatably connected to the left end of the bent rod, and the spherical ball is in rolling contact with the corresponding pressing frame.

[0028] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0029] 1. By adding a gas filtering component to the mold body, the gas sucked during the vacuum suction of the mold cavity can be filtered. As the vacuum channel is blocked, the impurity removal mesh plate in the gas filtering component slides out. With the suction effect of the negative pressure suction device, the automatic cleaning of the impurity removal mesh plate is realized. Thus, not only the filtering of the sucked gas is achieved, but also the frequent replacement and maintenance of the filtering structure are avoided, reducing the burden on the staff, lowering the maintenance cost, and ensuring the production efficiency of the product.

[0030] 2. By arranging 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, and then a pushing force is applied to the driving mechanism in the gas filtering component, thereby realizing the sliding out of the impurity removal mesh plate and opening the blocking plate, making the filter screen in a conducting state. At this time, the suction air direction of the negative pressure suction device in the mold body enters the air from the sliding-out impurity removal mesh plate. After the air flow passes through the filter screen, it enters the gas filtering component. At this time, the impurities adsorbed on the impurity removal mesh plate are blown out by the gas, thereby realizing the automatic impurity removal of the impurity removal mesh plate.

[0031] 3. When the impurity removal mesh plate is removing impurities, the impurities to be cleaned enter the interior of the bottom cover mechanism, and the air flow disturbance generated by the negative pressure suction rotates the impeller, driving the adjusting rod to perform reciprocating displacement activities, and then driving the cleaning plate in the bottom cover mechanism to perform reciprocating activities, thereby realizing the cleaning of 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 assembly in the bottom cover mechanism to move, thereby knocking and vibrating the impurities falling in the bottom cover. If the impurity removal mesh plate slides out at this time, the movement of the vibration assembly further accelerates the impurity removal and cleaning of the impurity removal mesh plate. If the impurity removal mesh plate fails to slide out at this time, the movement of the vibration assembly facilitates the sliding and cleaning of the impurities located in the bottom cover.

[0033] 5. By setting up a plugging mechanism, the movement of the two plugging blocks in the mold body can be adjusted, thus ensuring the vacuum treatment of the inside of the mold cavity. The plugging mechanism and the two plugging blocks in the mold body can be disassembled. A limiting ring is threadedly connected to the splicing rod connecting the plugging blocks of the mold body in the plugging mechanism, which facilitates its application on different mold bodies, thereby improving the applicability of the product.

[0034] 6. Multiple mold bodies are loaded on the same negative pressure suction device in series, and a control valve is configured. Thus, during actual use, the number of mold bodies in use can be controlled according to the opening and closing of the control valve, replacing the individually configured vacuum suction device in the existing product, further reducing the layout cost of the product and facilitating the popularization and use of the product. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0037] Figure 3 For Figure 1 Longitudinal sectional structure schematic diagram;

[0038] Figure 4 For Figure 3 Enlarged schematic diagram of the partial structure at A of

[0039] Figure 5 For Figure 3 Front view structure schematic diagram;

[0040] Figure 6 For Figure 5 Enlarged schematic diagram of the partial structure at B of

[0041] Figure 7 For Figure 2 Schematic diagram of the structure of the gas filtering component;

[0042] Figure 8 For Figure 7 Side upward view structure schematic diagram;

[0043] Figure 9 For Figure 7 Partial sectional structure schematic diagram;

[0044] Figure 10 For Figure 9 Enlarged schematic diagram of the partial structure at C of

[0045] Figure 11 ForFigure 9 Axonometric view structure schematic diagram;

[0046] Figure 12 is Figure 11 Bottom view structure schematic diagram;

[0047] Figure 13 is Figure 12 Enlarged schematic diagram of the partial structure at D of;

[0048] Figure 14 is Figure 9 Bottom view structure schematic diagram;

[0049] Figure 15 is Figure 14 Enlarged schematic diagram of the partial structure at E of;

[0050] Figure 16 is Figure 9 Schematic diagram of the impurity removal mesh plate and the adjustment component structure of;

[0051] Figure 17 It is a distribution diagram of the mold body and the negative pressure suction device of a die-casting mold cavity vacuum pumping system.

[0052] In the figure: 1. Mold body; 11. Fixed mold; 12. Movable mold; 13. Plugging block; 2. Plugging mechanism; 21. Bottom plate; 22. Support column; 23. Swing arm; 24. Splicing rod; 25. Limit ring; 3. Gas filtering component; 31. Box body; 32. Hemispherical box; 33. L-shaped plate; 34. Partition plate; 35. Driving mechanism; 351. Guide rod; 352. Carrier plate; 353. Extension arm; 354. Contact rod; 355. Adjustment component; 3551. Rack; 3552. Gear; 3553. Cam; 3554. Traction rod; 36. Impurity removal mesh plate; 37. Filter net; 38. Plugging plate; 39. Bottom cover mechanism; 391. Bottom cover; 3911. Cover body; 3912. Moving rod; 392. Vibration component; 3921. Integrating plate; 3922. Knocking rod; 3923. Bent rod; 3924. Extrusion frame; 310. Impeller; 311. Adjusting arm; 312. Wing plate; 313. Cleaning part; 3131. Cleaning plate; 3132. Sub-plate; 4. Negative pressure suction device. Specific implementation mode

[0053] Please refer to Figure 1 、 Figure 2 and Figure 17, in an embodiment of the present invention, a vacuum pumping system for a die-casting mold cavity includes a plurality of mold bodies 1 having mold cavities and a negative pressure pumping device 4 for negative pressure suction. Among them, the mold bodies 1 and the negative pressure pumping device 4 are connected by a pipeline. The pipeline is composed of a main pipe and branch pipes. The main pipe is loaded on the negative pressure pumping device 4, and there are multiple branch pipes for connecting several mold bodies 1 to the main pipe, and a control valve is provided on each branch pipe.

[0054] Please refer to Figures 3 - 6 , in an embodiment of the present invention, a plugging mechanism 2 is provided at the bottom of each mold body 1, and a gas filtering component 3 for connecting the 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 closed up and down. After the fixed mold 11 and the movable mold 12 are closed, a mold cavity for die-casting workpieces will be formed inside.

[0055] Among them, receiving grooves are opened on both inner walls of the fixed mold 11. A plugging block 13 is slidably connected in the receiving groove, and a through hole is opened on the bottom shell wall of the receiving groove. The setting of the receiving groove facilitates the configuration of the plugging block 13, and then the plugging operation of the mold cavity space is realized through the movement of the plugging block 13.

[0056] A rectangular channel penetrating the corresponding side wall of the fixed mold 11 is opened at the top of the left receiving groove to serve as a vacuum channel. The setting of the vacuum channel facilitates the evacuation of the inside of the mold cavity. An opening penetrating the corresponding side wall of the fixed mold 11 is opened at the top of the right receiving groove, and this opening is used as a feeding channel. The setting of the feeding channel facilitates the pouring of molten metal.

[0057] The plugging 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 a swing arm 23 is movably connected to the top of the bottom plate 21. There are four support columns 22, which are respectively fixedly connected to the four corners of the top of the bottom plate 21 by screws, and the top of the support column 22 is fixedly connected to the outer wall of the bottom of the fixed mold 11 by screws.

[0058] Both ends of the swing arm 23 are movably connected with splicing rods 24. The tops of multiple splicing rods 24 respectively penetrate the corresponding through holes and are installed on the corresponding plugging blocks 13, and a limiting ring 25 for limiting is threadedly connected to the splicing rods 24. The setting of the limiting ring 25 on the splicing rod 24 is to facilitate the matching use of the plugging mechanism 2 with different mold bodies 1. Then, when the plugging mechanism 2 and the mold body 1 are assembled before the product is used, the position of the limiting ring 25 on the splicing rod 24 can be flexibly adjusted.

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

[0060] Below each splicing rod 24, a compression spring is installed on the bottom shell wall of the swing arm 23, and the bottom end of the compression spring is fixedly connected to the bottom plate 21. The elastic force of the left compression spring among the compression springs on both sides is stronger than that of the right compression spring. Therefore, under normal circumstances, the swing arm 23 is in a state where the left end is low and the right end is high.

[0061] Please refer to Figures 7 - 8 , in the embodiment of the present invention, the gas filtering component 3 includes a box body 31 installed on the left outer wall of the fixed mold 11 through screws. The box body 31 is designed with openings at both ends.

[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 in communication 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 a pipeline.

[0063] An impeller 310 is rotatably connected inside the hemispherical box 32. A dust removal mesh plate 36 for filtering gas impurities is provided on the right side of the impeller 310. A filter mesh 37 for ventilation is provided on the right side of the dust removal mesh plate 36, and a plugging plate 38 for capping is provided on the filter mesh 37. The setting of the plugging plate 38 is in a closed state when the dust removal mesh plate 36 does not leave the box body 31, thereby realizing the vacuum pumping treatment of the mold cavity in the mold body 1. When the dust removal mesh plate 36 is cleaned, it moves downward and squeezes the plugging plate 38 to open it, so as to facilitate the inflow of external gas into the inside of the box body 31.

[0064] Bottom cover mechanisms 39 are installed around the bottom of the filter mesh 37. The impeller 310 and the bottom cover mechanisms 39 are linked through an adjusting arm 311. Driving mechanisms 35 are provided inside the box body 31 on the front and rear sides of the dust removal mesh plate 36. Through the movement of the driving mechanisms 35, the position adjustment of the dust removal mesh plate 36 is realized.

[0065] Please refer to Figure 3 , Figure 7 and Figure 8 , in the embodiment of the present invention, a wedge-shaped frame is provided on the top of the left plugging block 13. The wedge-shaped frame is composed of a straight plate and a wedge-shaped plate. Among them, there are two wedge-shaped plates, which are symmetrically arranged front and rear on the top of the straight plate, and the straight plate is fixedly connected to the corresponding plugging block 13 through screws. The two wedge-shaped plates respectively correspond to the corresponding driving mechanisms 35, so as to ensure the stability of the dust removal mesh plate 36 during adjustment.

[0066] The box body 31 is located on the left side of the vacuum channel and is used to cover the vacuum channel. This ensures the vacuum pumping process for the inner cavity of the mold body 1.

[0067] Please refer to Figure 9 、 Figure 10 and Figure 16 In the embodiment of the present invention, L-shaped plates 33 are integrally provided on the front and rear inner walls of the box body 31. The setting of the two L-shaped plates 33 makes a ventilation area and a working area formed inside the box body 31. Among them, there are two working areas, located on both sides of the ventilation area. The ventilation area is for the flow of gas, while the working area is for the configuration of the structure.

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

[0069] The impurity removal mesh plate 36 is located directly below the partition plate 34, and the bottom of the impurity removal mesh plate 36 penetrates through the bottom shell wall of the box body 31. Thus, the impurity removal mesh plate 36 can leave the box body 31 from the bottom 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 through bolts.

[0070] A notch located on the bottom shell wall of the box body 31 is provided on the right side of the impurity removal mesh plate 36, and a filter net 37 is arranged in the notch. The installation method of the filter net 37 in the notch is diverse, and in this embodiment, it is installed by means of bolt connection. The configuration of the filter net 37 is to prevent the impurities being cleaned from entering the inside of the box body 31 when the impurity removal mesh plate 36 is cleaned.

[0071] The blocking plate 38 is installed above the notch through a connecting shaft. Among them, the two ends of the connecting shaft are respectively rotatably connected to the corresponding L-shaped plates 33, and a torsion spring is sleeved on the connecting shaft. The configuration of the torsion spring enables the blocking plate 38 to automatically reset without external force, so as to cover and block the notch.

[0072] A wing plate 312 for pressing the blocking plate 38 is installed on the right side shell wall of the impurity removal mesh plate 36. The configuration of the wing plate 312 applies a force to press the blocking plate 38 during the downward movement of the impurity removal mesh plate 36, so as to simultaneously open the blocking plate 38.

[0073] Please refer to Figure 11 In the embodiment of the present invention, the impeller 310 is composed of a transmission shaft and blades. Among them, the two ends of the transmission shaft respectively penetrate through the corresponding side walls of the hemispherical box 32 and end caps are installed. The configuration of the end caps can prevent the internal thread ring from detaching from the transmission shaft.

[0074] There are multiple 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 32. The arrangement of the blades enables the rotation of the impeller 310 when the air flow moves inside the box body 31. Among them, a reciprocating thread is provided on the part of the transmission shaft extending outside the hemispherical box 32, and an internally threaded ring is threadedly connected thereto. The internally threaded ring is slidably connected to the box body 31. A guiding groove is provided on the left side wall of the box body 31, and a guiding block is slidably connected in the guiding groove. The side of the guiding block away from the guiding groove is fixedly connected to the corresponding internally threaded ring. A plurality of adjusting arms 311 are respectively fixedly connected to the corresponding internally threaded rings.

[0075] Please refer to Figures 11 - 12 , in the embodiment of the present invention, two driving mechanisms 35 are respectively arranged in the corresponding working areas. Among them, the driving mechanism 35 includes guiding rods 351 symmetrically arranged up and down inside the working area. A carrier plate 352 is sleeved on the two guiding rods 351 together, and a return spring located on the corresponding guiding rod 351 is sleeved between the carrier plate 352 and the left inner wall of the box body 31. The setting of the return spring enables the carrier plate 352 to perform a reset movement without external force. The setting of the two guiding rods 351 ensures the stability of the displacement movement of the carrier plate 352.

[0076] A through groove is provided on the right side wall of the L-shaped plate 33, and 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.

[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 movable contact with the wedge-shaped frame. A regulating component 355 for adjusting the impurity removal mesh plate 36 is provided on the left side of the carrier plate 352.

[0078] A ball is rotatably connected to the other end of the contact rod 354, and the ball is in rolling contact with the inclined surface of the wedge-shaped plate in the wedge-shaped frame. As the wedge-shaped frame moves upward, the inclined surface of its inclined plate is in movable contact with the contact rod 354, so that the contact rod 354 is forced to move, and then drives the carrier plate 352 to perform a displacement activity through the extension arm 353, thereby realizing the movement of the regulating component 355.

[0079] Please refer to Figure 11 , Figure 12 and Figure 16 , in the embodiment of the present invention, the regulating component 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 installed on the rotating shaft. Among them, the cam 3553 is located at the end of the rotating shaft, and a rack 3551 meshing with it 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 engaged gear 3552 moves synchronously. When the gear 3552 moves, the rotating shaft drives the cam 3553 to move synchronously.

[0081] Below the rotating shaft, a passing groove is provided on the corresponding side wall of the L-shaped plate 33. A convex rod is movably connected in the passing groove. One end of the convex rod is fixedly connected to the corresponding side wall of the impurity removal mesh 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. During the rotational movement of the cam 3553, through the cooperation of the traction rod 3554, the lifting adjustment of the impurity removal mesh plate 36 is realized.

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

[0083] Please refer to Figures 12 - 15 , in the embodiment of the present invention, a cleaning member 313 for impurity cleaning is provided below the filter screen 37. The cleaning member 313 includes sliding grooves provided on both sides of the filter screen 37. Sliding blocks are slidably connected in the sliding grooves. A cleaning plate 3131 for cleaning the filter screen 37 is commonly installed at the bottoms of the two sliding blocks. The style of the cleaning plate 3131 is diverse. In this embodiment, a brush structure is adopted to realize efficient cleaning of the filter screen 37.

[0084] Auxiliary plates 3132 are installed on the front and rear side walls of the cleaning plate 3131. Oblique grooves are provided on the auxiliary plates 3132. Slide rods are slidably connected in the oblique 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 is designed in an inclined manner to facilitate the falling of impurities. Movement rods 3912 are movably connected to the front and rear side walls of the cover body 3911. One ends of the movement rods 3912 extending into the interior of the cover body 3911 are fixedly connected to the corresponding slide rods respectively, and the other ends of the movement rods 3912 are fixedly connected to the corresponding adjusting arms 311 by screws respectively. When the adjusting arm 311 moves reciprocally, the slide rods are driven to move in the oblique grooves through the movement rods 3912, so as to realize the reciprocating displacement movement of the cleaning plate 3131.

[0086] The vibration assembly 392 includes auxiliary frames located on the front and rear outer walls of the cover body 3911. A bent rod 3923 is movably connected to the auxiliary frame, and the right ends of a plurality of bent rods 3923 are commonly connected to an integration plate 3921. A plurality of knocking rods 3922 located on the integration plate 3921 are arranged between two bent 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 enables the synchronous movement of a plurality of knocking rods 3922, thereby realizing the knocking vibration of the cover body 3911.

[0087] A vibration spring located on the corresponding bent rod 3923 is sleeved between each auxiliary frame and the integration plate 3921. An extrusion frame 3924 located on the corresponding adjusting arm 311 is provided on the left side of each bent rod 3923. Among them, a spherical ball is rollingly connected to the left end of the bent rod 3923, and the spherical ball is in rolling contact with the corresponding extrusion frame 3924. When the adjusting arm 311 performs a reciprocating movement, the extrusion frame 3924 moves synchronously. Furthermore, when the extrusion frame 3924 contacts the corresponding bent rod 3923, the integration plate 3921 generates a vibration effect. If the impurity removal mesh plate 36 is not cleaned, the movement of the vibration assembly 392 further facilitates the cleaning of impurities adhering to the cover body 3911.

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

[0089] The working principle of the present invention is: when the product is in use, the corresponding control valves on the pipelines connecting it to the negative pressure suction device 4 are switched on or off according to the number of mold bodies 1 to be used on the external controller, so as to ensure that the mold cavity of the mold body 1 to be used is evacuated during the workpiece die casting.

[0090] First, the mold body 1 to be used is closed. Under the action of the compression springs arranged on both sides in the blocking mechanism 2, the swing arm 23 then makes an activity adjustment with the left side lower and the right side higher. Along with the movement of the swing arm 23, the corresponding splicing rods 24 connected thereto move synchronously, so that the two blocking blocks 13 in the fixed mold 11 of the mold body 1 are left lower and right higher. Then, the blocking block 13 on the left side does not block the vacuum channel, while the blocking block 13 on the right side blocks the corresponding receiving groove, so that the mold cavity of the mold body 1 can be evacuated.

[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 internal thread ring threadedly connected thereto moves reciprocally, thereby driving the corresponding adjusting arm 311 to move reciprocally. When the adjusting arm 311 moves, it pulls the movement rod 3912 of the bottom cover 391 in the bottom cover mechanism 39 to move reciprocally, thereby driving the cleaning member 313 to move and cleaning the impurities adhered to the filter net 37 to prevent blockage. Moreover, when the adjusting arm 311 moves, it synchronously drives the extrusion frame 3924 in the vibration assembly 392 to move synchronously. Then, the corresponding bent rod 3923 in contact therewith drives the integration plate 3921 to move, thereby knocking the cover body 3911 through the knocking rod 3922. Thus, on the one hand, it speeds up the cleaning of the impurities on the impurity removal net plate 36, and on the other hand, it facilitates the cleaning of the impurities on the cover body 3911.

[0099] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes should be covered within 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 cavities and a negative pressure pumping device (4) for negative pressure suction, wherein, The mold body (1) is connected to the negative pressure suction device (4) through a pipeline. It is characterized in that: a plugging mechanism (2) is arranged at the bottom of each mold body (1), and a gas filtering component (3) for connecting the 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 closed up and down. Among them, receiving grooves are opened on both inner walls of the fixed mold (11). A plugging block (13) is slidably connected in the receiving groove, and a through hole is opened on the bottom shell wall of the receiving groove. A rectangular channel penetrating the corresponding side wall of the fixed mold (11) is opened 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 opened at the top of the right receiving groove. This notch is used to serve as a feeding channel; The gas filtering component (3) includes a box body (31) installed 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 the pipeline, and an impeller (310) is rotatably connected inside the hemispherical box (32). A dust removal mesh plate (36) for filtering gas impurities is arranged on the right side of the impeller (310). A filter mesh (37) for ventilation is arranged on the right side of the dust removal mesh plate (36). A plugging plate (38) for capping is arranged on the filter mesh (37). A bottom cover mechanism (39) is installed around the bottom of the filter mesh (37). The impeller (310) and the bottom cover mechanism (39) are linked through an adjusting arm (311). Driving mechanisms (35) are arranged on the front and rear sides of the dust removal mesh plate (36) and are located inside the box body (31); L-shaped plates (33) are integrally arranged on the front and rear inner walls of the box body (31). The arrangement 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, located on both sides of the ventilation area. A partition plate (34) is arranged between the two L-shaped plates (33) and is located in the ventilation area. This partition plate (34) is used to strengthen the stability of the internal space of the box body (31); The dust removal mesh plate (36) is located directly below the partition plate (34), and the bottom of the dust removal mesh plate (36) penetrates the bottom shell wall of the box body (31). An inspection opening is opened on the top shell wall of the box body (31), and an inspection plate is installed in the inspection opening through bolts; A notch located on the bottom shell wall of the box body (31) is opened on the right side of the dust removal mesh plate (36). The filter mesh (37) is arranged in the notch. The plugging plate (38) is installed above the notch through a connecting shaft. Among them, both ends of the connecting shaft are respectively rotatably connected to the corresponding L-shaped plates (33), and a torsion spring is sleeved on the connecting shaft. A wing plate (312) for pressing the plugging plate (38) is installed on the right shell wall of the dust removal mesh plate (36).

2. The vacuum pumping system for the die casting mold cavity according to claim 1, wherein A wedge-shaped frame is arranged at the top of the left plugging block (13). The wedge-shaped frame is composed of a straight plate and a wedge-shaped plate. Among them, there are two wedge-shaped plates, which are symmetrically arranged front and back on the top of the straight plate, and the straight plate is fixedly connected to the corresponding plugging 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. The vacuum pumping system for the die casting mold cavity according to claim 2, characterized in that, The plugging mechanism (2) includes a bottom plate (21) located below the mold body (1). The bottom plate (21) is supported by support columns (22) between the fixed mold (11). A swing arm (23) is movably connected to the top of the bottom plate (21). Both ends of the swing arm (23) are movably connected to splicing rods (24). The tops of multiple splicing rods (24) respectively penetrate through corresponding through holes and are installed on corresponding plugging blocks (13). A limiting ring (25) for limiting is threadedly connected to the splicing rod (24). There are four support columns (22), which are respectively fixedly connected to the four corners of the top of the bottom plate (21) by screws, and the tops of the support columns (22) are fixedly connected to the outer wall of the bottom of the fixed mold (11) by screws. A U-shaped frame is movably connected to the swing arm (23) by a pin shaft. The bottom of the U-shaped frame is fixedly connected to the center of the top of the bottom plate (21). Return grooves are provided at both ends of the swing arm (23). The splicing rod (24) is movably connected to the return groove by a pin shaft. An extrusion spring is installed on the bottom shell wall of the swing arm (23) directly below each splicing rod (24). The bottom end of the extrusion spring is fixedly connected to the bottom plate (21).

4. A vacuum pumping system for a die-casting mold cavity according to claim 3, characterized in that The impeller (310) is composed of a transmission shaft and blades. The two ends of the transmission shaft respectively penetrate through the corresponding side walls of the hemispherical box (32) and end caps are installed. There are multiple 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). A reciprocating thread is provided on the part of the transmission shaft extending outside the hemispherical box (32), and an internal thread ring is threadedly connected to the reciprocating thread. The internal thread ring is slidably connected to the box body (31). Multiple adjusting arms (311) are respectively fixedly connected to the corresponding internal thread rings.

5. The vacuum pumping system for the die-casting mold cavity according to claim 4, characterized in that, Two driving mechanisms (35) are respectively arranged in corresponding working areas. The driving mechanism (35) includes guide rods (351) symmetrically arranged up and down inside the working area. A carrier plate (352) is sleeved on the two guide rods (351). A return spring is sleeved on the corresponding guide rod (351) between the carrier plate (352) and the left inner wall of the box body (31). A through groove is provided on the right shell wall of the L-shaped plate (33). An extension arm (353) is movably connected to the through groove. The left end of the extension arm (353) is fixedly connected to the corresponding carrier plate (352) by a bolt. 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 in movable contact with the wedge-shaped frame. An adjusting assembly (355) for adjusting the impurity removal mesh plate (36) is provided on the left side of the carrier plate (352). A ball is rollingly connected to the other end of the contact rod (354), and the ball is in rolling contact with the inclined surface of the wedge-shaped plate in the wedge-shaped frame.

6. The vacuum pumping system for the die-casting mold cavity according to claim 5, wherein The adjusting component (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. Among them, 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). A passing groove located on the corresponding side wall of the L-shaped plate (33) is formed below the rotating shaft. A convex rod is movably connected in the passing groove. One end of the convex rod is fixedly connected to the corresponding side wall of the impurity removal net 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 formed on the peripheral wall of the cam (3553), and a slider is slidably connected in the annular groove. The top end of the cam (3553) is fixedly connected to the slider.

7. A vacuum pumping system for a die casting mold cavity according to claim 1, wherein, A cleaning member (313) for cleaning impurities is provided below the filter net (37). The cleaning member (313) includes sliding grooves formed on both sides of the filter net (37). Sliding blocks are slidably connected in the sliding grooves. A cleaning plate (3131) for cleaning the filter net (37) is jointly mounted at the bottoms of the two sliding blocks. Auxiliary plates (3132) are mounted on the front and rear side shell walls of the cleaning plate (3131). Oblique grooves are formed on the auxiliary plates (3132), and sliding rods are slidably connected in the oblique grooves.

8. A vacuum pumping system for a die casting mold cavity according to claim 7, characterized in that, The bottom cover mechanism (39) is composed of a bottom cover (391) and a vibration component (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) through screws. Movement rods (3912) are movably connected to the front and rear side shell walls of the cover body (3911). The ends of the movement rods (3912) extending into the interior of the cover body (3911) are fixedly connected to the corresponding sliding rods respectively, and the other ends of the movement rods (3912) are fixedly connected to the corresponding adjusting arms (311) through screws respectively.

9. The vacuum pumping system for the die-casting mold cavity according to claim 8, wherein The vibration component (392) includes auxiliary frames located on the front and rear outer walls of the cover body (3911). Bent rods (3923) are movably connected to the auxiliary frames. The right ends of a plurality of bent rods (3923) are jointly connected to an integration plate (3921). A plurality of knocking rods (3922) located on the integration plate (3921) are arranged between two bent rods (3923). The knocking rods (3922) are used for knocking the corresponding side walls of the cover body (3911). A vibration spring is sleeved on each corresponding bent rod (3923) between each auxiliary frame and the integration plate (3921). An extrusion frame (3924) located on the corresponding adjusting arm (311) is provided on the left side of each bent rod (3923). Among them, a spherical ball is rotatably connected to the left end of the bent rod (3923), and the spherical ball is in rolling contact with the corresponding extrusion frame (3924).

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