A multi-position variable cavity extrusion plate device with exhaust function

Abstract

The present invention relates to the field of molding sand casting, and specifically discloses a multi-position variable cavity extrusion plate device with an exhaust function. The present application movably inserts a columnar push block into a through hole evenly distributed on a second push plate, and cooperates with a plurality of first hydraulic push rods to independently control each columnar push block. When the second push plate pushes the molding sand, the corresponding columnar push blocks will move synchronously to provide corresponding flow space for the molding sand, which is beneficial to enhancing the fluidity of the molding sand in a local area of ​​the first molding chamber, and to a certain extent improves the uniformity of the density of the internal molding sand after the sand mold is extruded and molded in the first molding chamber. At the same time, by fixing a reserved block corresponding to the concave and convex parts of the mold on the first push plate, the distance by which the molding sand in each part of the first molding chamber is pushed is consistent, which also effectively ensures the uniformity of the density of the molding sand after being pushed in the first molding chamber. Under the cooperation with each other, it is beneficial to improve the structural stability and quality of the sand mold after molding.

Description

Technical Field

[0001] The present application relates to the field of sand casting, and in particular to a multi-position variable cavity extrusion plate device with exhaust function. Background Art

[0002] The sand mold is a casting cavity formed by extruding molding sand during the casting production process. During the sand mold preparation process, a mold of the same size as the product to be processed will be set in the middle position of the molding chamber on both sides. After the molding sand is injected into the molding chamber, extrusion pressure is applied to the molding sand in the mold at both symmetrical ends of the molding chamber on both sides, so that the sand mold is compacted in the molding chamber, separated from the molding chamber after demoulding, and finally formed into a sand mold for product casting production.

[0003] When the molding sand is extruded, the thickness of the molding sand in the molding chamber is inconsistent due to the inconsistent thickness of the concave and convex parts of the mold, which makes the thickness of the molding sand distribution in the molding chamber also inconsistent. The molding sand thickness in some positions is small, while the molding sand thickness in some positions is large. There is an obvious thickness difference between the molding sand in two adjacent areas. Due to the poor fluidity of the molding sand, if it is directly extruded, the molding sand in different areas is difficult to flow and complement each other, resulting in uneven density of the molding sand distribution inside the extruded sand mold, which is easy to affect the structural stability and quality of the sand mold after molding.

[0004] To this end, a multi-position variable cavity extrusion plate device with exhaust function is proposed to solve some problems existing in the above-mentioned prior art. Summary of the invention

[0005] The purpose of the present application is to solve the problem of poor fluidity of the molding sand during sand mold extrusion molding in the prior art, which leads to uneven density inside the sand mold after molding. Compared with the prior art, a multi-position variable cavity extrusion plate device with an exhaust function is provided, including an outer frame, a first molding chamber and a second molding chamber symmetrically arranged on the outer frame, a vertically arranged middle plate is clamped between the first molding chamber and the second molding chamber, molds are fixed on the left and right end walls of the middle plate, the tops of the first molding chamber and the second molding chamber are fixedly connected with sand injection ports, a sand injection hopper arranged above the first molding chamber and the second molding chamber is installed on the outer frame, and a docking interface compatible with the left and right sand injection ports is fixedly arranged on the bottom of the sand injection hopper, a vertically arranged second push plate is slidably installed in the second molding chamber, and a second bracket is fixedly installed on the side of the second push plate away from the middle plate, and a plurality of The cam is provided with a plurality of evenly distributed through holes, and a first hydraulic push rod corresponding to the plurality of through holes is fixedly mounted on the second bracket, and a cylindrical push block fixedly connected to the corresponding telescopic end of the first hydraulic push rod is slidably mounted in the through hole, and the length of the cylindrical push block protruding from the outside of the through hole is adapted to the protrusion degree of the mold in the second molding chamber, and a vertically arranged first push plate is slidably mounted in the first molding chamber, and a first bracket is fixedly mounted on the side of the first push plate away from the middle plate, and a plurality of reserved mold rods and reserved blocks are mounted on the side of the first push plate close to the middle plate, and the reserved blocks are adapted to the recessed positions on the mold, and second hydraulic push rods are fixedly mounted on both ends of the outer frame, the telescopic end of the second hydraulic push rod on the left side is connected to the first bracket, and the telescopic end of the second hydraulic push rod on the right side is connected to the second bracket, and the end walls of the first molding chamber and the second molding chamber are provided with first exhaust holes evenly distributed around.

[0006] Furthermore, the top of the sand injection hopper is externally connected to a high-pressure sand injection device, and the sand injection hopper and the two docking ports at its lower end are both configured as V-shaped structures, and the molding sand is injected into the first molding chamber and the second molding chamber at high speed through high-pressure airflow.

[0007] Furthermore, a third hydraulic push rod disposed transversely is fixedly mounted on the front and rear side end walls of the first molding chamber, and a telescopic end of the third hydraulic push rod is connected to the first bracket.

[0008] Furthermore, evenly distributed second exhaust holes are provided in the cylindrical push block, and the second exhaust holes transversely penetrate the left and right circular end walls of the cylindrical push block, and a plurality of evenly distributed fourth exhaust holes are provided in the first push plate.

[0009] Furthermore, evenly distributed third exhaust holes are opened on the cylindrical surface of the columnar push block, and the third exhaust holes are connected to the second exhaust holes.

[0010] Furthermore, a first connecting cavity connected to the first exhaust hole is formed in the end walls of the first molding chamber and the second molding chamber, a second connecting cavity connected to the second exhaust hole is formed in the second bracket, and a connecting cover connected to the fourth exhaust hole is fixedly covered on the end wall of the first push plate away from the middle plate, and the first connecting cavity, the second connecting cavity and the connecting cover are all externally connected to a pump.

[0011] Furthermore, evenly distributed sockets are opened on the end wall of the first push plate close to the middle plate, and a sealing mechanism is filled in the sockets. The reserved mold rod and the reserved block are also fixed with a sealing mechanism. The reserved mold rod and the reserved block are firmly installed on the first push plate through the sealing mechanism.

[0012] Furthermore, a limiting ring is fixedly installed on the inner end wall of the socket, a first electromagnet is fixedly installed at the center position of the bottom of the socket, the blocking mechanism includes a blocking block adapted to the inner diameter of the socket, and a rod movably inserted in the limiting ring is fixedly installed at the axial position of the blocking block, a plurality of circumferentially distributed grooves are provided on the cylindrical surface of the rod, and gears are rotatably installed in the grooves, a swing arm is fixedly installed on the gear, a slot is provided at the axial position of the end wall of the rod away from the blocking block, and a movable block arranged between a plurality of gears is slidably installed in the slot, a rack meshing with the gear is mounted on the cylindrical surface of the movable block, a tension spring for elastically pulling the movable block is fixedly connected in the slot, and a first magnet corresponding to the first electromagnet is fixedly installed in the movable block.

[0013] Furthermore, a second electromagnet sleeved on the outside of the first electromagnet is fixedly installed at the bottom of the hole of the jack, and a second magnet corresponding to the second electromagnet is fixedly installed at one end of the insertion rod away from the blocking block.

[0014] Furthermore, a first magnetic isolation ring arranged on the inner side of the second magnet is fixedly installed on the insertion rod, and an annular groove is arranged between the first magnetic isolation ring and the second magnet, the second magnetic isolation ring is slidably inserted in the annular groove, and a spring for elastically supporting the second magnetic isolation ring is fixedly installed in the annular groove.

[0015] Compared with the prior art, the beneficial effects of this application are:

[0016] (1) The present application arranges cylindrical push blocks movably in through holes evenly distributed on the second push plate, and cooperates with a plurality of first hydraulic push rods to independently control each cylindrical push block. When the second push plate pushes the molding sand, the corresponding cylindrical push blocks will move synchronously to provide corresponding flow space for the molding sand, which is beneficial to enhancing the fluidity of the molding sand in a local area in the first molding chamber, and to a certain extent improves the uniformity of the density of the internal molding sand after the sand mold is extruded and molded in the first molding chamber. At the same time, by fixing the reserved blocks corresponding to the concave and convex parts of the mold on the first push plate, the distances by which the molding sand in various parts of the first molding chamber is pushed are consistent, which also effectively ensures the uniformity of the density of the molding sand after being pushed in the first molding chamber. With mutual cooperation, it is beneficial to improve the structural stability and quality of the sand mold after molding.

[0017] (2) The molding sand is injected into the first molding chamber and the second molding chamber at a high speed through the high-pressure airflow, so that the molding sand can be quickly and completely filled in various parts of the first molding chamber and the second molding chamber, which is beneficial to improving the stability and uniformity of the molding sand injection. At the same time, by opening the first exhaust hole, the second exhaust hole, the third exhaust hole and the fourth exhaust hole, the pump actively sucks the airflow, which is beneficial to improving the high efficiency and stability of the airflow discharge from the first molding chamber and the second molding chamber, and to a certain extent improves the stability of the device in filling the first molding chamber and the second molding chamber with molding sand through the high-pressure airflow.

[0018] (3) By evenly opening a large number of insertion holes on the first push plate and providing a sealing mechanism adapted to the insertion holes, when the sealing mechanism is filled, the end wall of the first push plate forms a flat surface, and by fixing the sealing mechanism on the reserved mold rod and the reserved block, the reserved mold rod and the reserved block can be quickly connected to the first push plate with the help of the sealing mechanism. With the help of rapid disassembly and flexible replacement of the sealing mechanism, the position and quantity of the reserved mold rod and the reserved block can be flexibly adjusted according to actual production needs, so that the device is adapted to the processing of sand molds with different structures, effectively improving the flexibility of the device during actual use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front cross-sectional view of the present application;

[0020] Figure 2 For this application Figure 1 A magnified view of the structure at center A;

[0021] Figure 3 For this application Figure 1 A magnified view of the structure at B in the middle;

[0022] Figure 4 For this application Figure 1 A magnified view of the structure at C in the middle;

[0023] Figure 5For this application Figure 4 A magnified view of the structure at D in the middle;

[0024] Figure 6 A perspective view of the present application;

[0025] Figure 7 This is a front cross-sectional view of the sand mold after extrusion molding of the present application;

[0026] Figure 8 For this application Figure 7 A magnified view of the structure at E in the middle;

[0027] Fig. 9 This is a disassembled diagram of the first molding chamber, the second molding chamber, the second push plate and the first push plate of the present application;

[0028] Fig.10 This is a three-dimensional diagram of the second push plate of the present application being arranged in the second molding chamber;

[0029] Fig.11 A perspective view of a cylindrical push block of the present application;

[0030] Fig.12 This is a three-dimensional diagram of the first push plate of the present application being arranged in the first molding chamber;

[0031] Fig.13 A three-dimensional diagram of the mold rod and the blocking mechanism when fixedly connected is reserved for this application;

[0032] Fig.14 This is a disassembled diagram of the blocking mechanism for this application.

[0033] Description of the numbers in the figure:

[0034] 1. outer frame; 101. first molding chamber; 102. second molding chamber; 103. middle plate; 104. mold; 105. sand injection port;

[0035] 2. Sand injection hopper; 201. Docking port;

[0036] 3. Second push plate; 301. Second bracket; 302. Through hole; 303. First hydraulic push rod; 304. Column push block;

[0037] 4. first push plate; 401. first bracket; 402. reserved mold rod; 403. reserved block;

[0038] 5. Second hydraulic push rod; 501. Third hydraulic push rod;

[0039] 6. First exhaust hole; 601. First connecting cavity; 602. Second exhaust hole; 603. Third exhaust hole; 604. Second connecting cavity; 605. Fourth exhaust hole; 606. Connecting cover;

[0040] 7. jack; 701. limit ring; 702. first electromagnet; 703. second electromagnet;

[0041] 8. Block; 801. Insertion rod; 802. Groove; 803. Gear; 804. Swing arm; 805. Movable block; 806. Rack; 807. Tension spring; 808. First magnet; 809. Second magnet;

[0042] 9. First magnetic isolation ring; 901. Ring groove; 902. Second magnetic isolation ring; 903. Spring. DETAILED DESCRIPTION

[0043] The embodiments will be combined with the drawings in the specification to clearly and completely describe the technical solution of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making any creative work shall fall within the scope of protection of the present application.

[0044] The present invention provides a multi-position variable cavity extrusion plate device with exhaust function, please refer to Fig.14, including an outer frame 1, on which a first molding chamber 101 and a second molding chamber 102 are installed, which are symmetrically arranged on the left and right, a vertically arranged middle plate 103 is sandwiched between the first molding chamber 101 and the second molding chamber 102, molds 104 are fixed on the left and right side end walls of the middle plate 103, the tops of the first molding chamber 101 and the second molding chamber 102 are fixedly connected with a sand injection port 105, and an electric control valve is installed in the sand injection port 105, and a sand injection hopper arranged above the first molding chamber 101 and the second molding chamber 102 is installed on the outer frame 1 2, and the bottom of the sand injection hopper 2 is fixedly provided with a docking port 201 adapted to the left and right sand injection ports 105, a second push plate 3 arranged vertically is slidably installed in the second molding chamber 102, and a second bracket 301 is fixedly installed on the side of the second push plate 3 away from the middle plate 103, a plurality of evenly distributed through holes 302 are opened on the second push plate 3, a first hydraulic push rod 303 corresponding to the plurality of through holes 302 is fixedly installed on the second bracket 301, and a first hydraulic push rod 303 corresponding to the telescopic end of the first hydraulic push rod 303 is slidably installed in the through hole 302 The cylindrical push block 304 is connected to the first molding chamber 101, and the length of the cylindrical push block 304 protruding outside the through hole 302 is adapted to the protrusion of the mold 104 in the second molding chamber 102. A vertically arranged first push plate 4 is slidably installed in the first molding chamber 101, and a first bracket 401 is fixedly installed on the side of the first push plate 4 away from the middle plate 103. A plurality of reserved mold rods 402 and reserved blocks 403 are installed on the side of the first push plate 4 close to the middle plate 103, and the reserved blocks 403 are adapted to the concave positions on the mold 104. The left and right ends of the outer frame 1 are fixed. A second hydraulic push rod 5 is fixedly installed, the telescopic end of the second hydraulic push rod 5 on the left is connected to the first bracket 401, and the telescopic end of the second hydraulic push rod 5 on the right is connected to the second bracket 301. The end walls of the first molding chamber 101 and the second molding chamber 102 are provided with first exhaust holes 6 evenly distributed around, and the top of the sand injection hopper 2 is externally connected to a high-pressure sand shooting device. The sand injection hopper 2 and the two docking ports 201 at its lower end are both set to a V-shaped structure, and the molding sand is injected into the first molding chamber 101 and the second molding chamber 102 at high speed through high-pressure airflow.

[0045] During the use of the device, a corresponding mold 104 is set according to the shape of the cast product to be cast. The shape of the cast product is consistent with the overall appearance of the molds 104 on the left and right sides of the middle plate 103. The sand mold required for the product is extruded by the molding sand, and finally extruded and formed in the first molding chamber 101 and the second molding chamber 102. During the extrusion of the molding sand inside the first molding chamber 101 and the second molding chamber 102, the cavity presented by the support of the mold 104 is the mold cavity used for the final cast product. During the operation of the device, the position state of the columnar push blocks 304 evenly distributed on the second push plate 3 inside the second molding chamber 102 is adapted to the convex amplitude of the mold 104 in the second molding chamber 102, and the convex amplitude of the mold 104 in the second molding chamber 102 The larger the raised amplitude, the longer the length of the corresponding cylindrical push block 304 protruding from the outside of the through hole 302; the smaller the raised amplitude of the mold 104 in the second molding chamber 102, the shorter the length of the corresponding cylindrical push block 304 protruding from the outside of the through hole 302; if the end wall of the middle plate 103 in the second molding chamber 102 is not covered with the mold 104, the cylindrical push block 304 at the corresponding position is flushly accommodated in the through hole 302; the position and raised amplitude of the reserved block 403 installed on the first push plate 4 inside the first molding chamber 101 are adapted to the recessed part on the mold 104 in the first molding chamber 101; the larger the recessed part on the mold 104 in the first molding chamber 101, the larger the raised amplitude of the corresponding reserved block 403.

[0046] During operation, the external high-pressure sand-shooting device injects molding sand into the sand-injecting hopper 2 with the help of the flow of high-pressure airflow. The electric-controlled valve in the sand-injecting port 105 is in an open state. The molding sand entering the sand-injecting hopper 2 enters the first molding chamber 101 and the second molding chamber 102 through the connection between the left and right docking ports 201 and the sand-injecting port 105 with the help of the high-speed flowing high-pressure airflow. Since the molding sand is injected into the first molding chamber 101 and the second molding chamber 102 at a high speed with the help of the high-pressure airflow, the molding sand can fully and comprehensively enter various parts of the first molding chamber 101 and the second molding chamber 102, which is conducive to ensuring the comprehensiveness of the molding sand filling in the first molding chamber 101 and the second molding chamber 102. Moreover, since the molding sand is injected into the first molding chamber 101 and the second molding chamber 102 at a high speed, with the help of the impact force of the high-speed injection of the airflow, compared with the conventional situation In this case, the mode of directly pouring the molding sand can make the molding sand fill more tightly and tightly in the first molding chamber 101 and the second molding chamber 102. During subsequent extrusion, the sand mold formed by the molding sand filling is easier to be compacted and has higher quality. Since there are many first exhaust holes 6 distributed around the end walls of the first molding chamber 101 and the second molding chamber 102, the airflow carrying the molding sand into the first molding chamber 101 and the second molding chamber 102 can be discharged through the first exhaust holes 6. The aperture of the first exhaust holes 6 is smaller than the diameter of the molding sand, so that the airflow can be discharged smoothly, and the molding sand is stably retained in the first molding chamber 101 and the second molding chamber 102. The first exhaust holes 6 guide the injected airflow, which can avoid airflow chaos in the first molding chamber 101 and the second molding chamber 102, which is beneficial to ensure the stability of the device in efficiently injecting molding sand through high-pressure airflow.

[0047] When the molding sand is filled in the first molding chamber 101 and the second molding chamber 102, the electric control valve installed in the sand injection port 105 is closed, so that the first molding chamber 101 and the second molding chamber 102 are in a closed state. At this time, the second hydraulic push rods 5 installed at the left and right ends of the outer frame 1 are powered on and started, respectively pushing the second push plate 3 and the first push plate 4, so that the second push plate 3 and the first push plate 4 are close to the middle plate 103. In the process of the second push plate 3 approaching the middle plate 103, the first hydraulic push rod 303 will drive the corresponding columnar push block 304 to move, so that many columnar push blocks 304 are gradually collected in the through hole 302. Finally, all the columnar push blocks 304 are collected in the corresponding through holes 302, flush with the end wall of the second push plate 3 close to the middle plate 103, and each first hydraulic push rod 303 is It can be controlled independently, and the speed at which each first hydraulic push rod 303 drives the cylindrical push block 304 to move can be flexibly and independently controlled. When the lengths of the cylindrical push blocks 304 extending outward are different, the cylindrical push blocks 304 can eventually be retracted into the through hole 302 at the same time. During the pushing process of the second push plate 3, the cylindrical push blocks 304 complete the corresponding retraction. The space left during the retraction of the cylindrical push blocks 304 allows the surrounding molding sand to flow and fill better, thereby increasing the fluidity of the molding sand during the extrusion process, and avoiding uneven distribution of the internal molding sand after the sand mold is extruded due to inconsistent thickness of various parts of the molded sand mold. Under this processing method, the internal molding sand density of the sand mold finally formed in the second molding chamber 102 is uniform, which can effectively ensure the quality of the sand mold formed inside the second molding chamber 102.

[0048] In the process of the first push plate 4 approaching the middle plate 103, the reserved mold rod 402 and the reserved block 403 fixed thereon will be driven to move synchronously and approach the middle plate 103. Since the protrusion amplitude of the reserved block 403 is adapted to the depression amplitude of the depression portion on the mold 104 in the first molding chamber 101, during the extrusion process, the lateral widths of various positions in the internal molding space of the first molding chamber 101 are roughly the same, which means that during the extrusion process, the molding sand in the first molding chamber 101 does not need to be moved on a large scale, so that after the final extrusion molding, the thickness of various parts of the sand mold formed in the first molding chamber 101 remains consistent, and the density of the molding sand distribution is uniform, which can effectively ensure the quality of the sand mold formed in the first molding chamber 101. The presence of the reserved mold rod 402 can form structures such as pouring channels and exhaust ducts on the molded sand mold.

[0049] See also Figure 6, a transversely arranged third hydraulic push rod 501 is fixedly installed on the front and rear end walls of the first molding chamber 101, and the telescopic end of the third hydraulic push rod 501 is connected to the first bracket 401. During the use of the device, in order to keep the position of the first molding chamber 101 in a stable state, the third hydraulic push rod 501 will retract synchronously during the process of the left second hydraulic push rod 5 pushing the first push plate 4 to move to the right, and the retraction speed of the telescopic end of the third hydraulic push rod 501 is consistent with the extension speed of the telescopic end of the left second hydraulic push rod 5. After the sand mold inside the first molding chamber 101 is extruded and formed, the left second hydraulic push rod 5 retracts to drive the first push plate 4 to move to the left. At this time, the third hydraulic push rod 501 can be controlled not to operate. With the help of the first bracket 401 and the third hydraulic push rod 5 01, so that the first push plate 4 can drive the first molding chamber 101 to move to the left and separate from the middle plate 103 during the movement to the left. When the first molding chamber 101 is separated from the middle plate 103, the third hydraulic push rod 501 can be controlled to continue to retract, so that the first molding chamber 101 continues to move to the left relative to the first push plate 4. Under the relative movement, the sand mold formed in the first molding chamber 101 can be pushed out to realize the demolding operation. Similarly, the structure can be arranged between the second molding chamber 102 and the second bracket 301 to realize the convenient demolding of the sand mold in the second molding chamber 102. The hydraulic push rod for relative movement and demolding arranged between the second molding chamber 102 and the second bracket 301 is not drawn in the figure.

[0050] See also Figure 2 , Fig.11 and Fig.12 , the cylindrical push block 304 is provided with uniformly distributed second exhaust holes 602, and the second exhaust holes 602 are transversely penetrated on the circular end walls on the left and right sides of the cylindrical push block 304, a plurality of uniformly distributed fourth exhaust holes 605 are provided in the first push plate 4, and the cylindrical surface of the cylindrical push block 304 is provided with uniformly distributed third exhaust holes 603, and the third exhaust holes 603 are connected to the second exhaust holes 602. During the use of the device, the apertures of the second exhaust holes 602, the third exhaust holes 603 and the fourth exhaust holes 605 are all smaller than the diameter of the molding sand. Since the second exhaust holes 602 and the third exhaust holes 603 that are interconnected are respectively provided on the circular end wall and the cylindrical surface of the cylindrical push block 304, the efficiency of the airflow inside the second molding chamber 102 to be discharged outwardly can be enhanced from a three-dimensional level. At the same time, since the fourth exhaust holes 605 are uniformly provided on the first push plate 4, the efficiency of the airflow inside the first molding chamber 101 to be discharged outwardly can also be effectively enhanced.

[0051] See also Figure 1 - Figure 3The first molding chamber 101 and the second molding chamber 102 are surrounded by a first connecting cavity 601 connected to the first exhaust hole 6, and the second bracket 301 is provided with a second connecting cavity 604 connected to the second exhaust hole 602. The end wall of the first push plate 4 away from the middle plate 103 is fixedly covered with a connecting cover 606 connected to the fourth exhaust hole 605. The first connecting cavity 601, the second connecting cavity 604 and the connecting cover 606 are all connected to an external pump. When the device is used, the first connecting cavity 601, the second connecting cavity 604 and the connecting cover 606 are connected to the first connecting cavity 601, the second connecting cavity 604 and the connecting cover 606. The pump connected to the through cavity 604 and the connecting cover 606 is started to evacuate the first connecting cavity 601, the second connecting cavity 604 and the connecting cover 606, which enables the first exhaust hole 6, the second exhaust hole 602, the third exhaust hole 603 and the fourth exhaust hole 605 to actively suck the air outward. Through the active exhaust operation, the efficiency of the injected airflow in the first molding chamber 101 and the second molding chamber 102 to be discharged outward can be effectively improved, which is beneficial to further improve the stability of the device by means of high-speed and high-pressure airflow to envelop the injected molding sand.

[0052] See also Figure 1 , Fig.12 and Fig.13 , the end wall of the first push plate 4 close to the middle plate 103 is provided with evenly distributed jacks 7, and the jacks 7 are filled with a blocking mechanism, and the reserved mold rod 402 and the reserved block 403 are also fixed with a blocking mechanism, and the reserved mold rod 402 and the reserved block 403 are firmly installed on the first push plate 4 through the blocking mechanism. During the use of the device, the jacks 7 without the reserved mold rod 402 or the reserved block 403 will be blocked by the separate blocking mechanism, and the blocking filling of the separate blocking mechanism makes the first push plate 4 The end wall of one side of a push plate 4 close to the middle plate 103 is in a flat state. When installing the reserved mold rod 402 or the reserved block 403, it is only necessary to remove the blocking mechanism installed in the corresponding position socket 7 and replace it with the corresponding reserved mold rod 402 or the reserved block 403. The reserved mold rod 402 and the reserved block 403 are fixedly installed in the socket 7 by blocking, which makes the installation position of the reserved mold rod 402 and the reserved block 403 flexibly replaceable, effectively improving the flexibility of the device during actual use.

[0053] See also Figure 4 and Fig.14A limiting ring 701 arranged around is fixedly installed on the inner end wall of the plug hole 7, a first electromagnet 702 is fixedly installed at the center of the bottom of the plug hole 7, the blocking mechanism includes a blocking block 8 adapted to the inner diameter of the plug hole 7, and a plug rod 801 movably inserted in the limiting ring 701 is fixedly installed at the axial position of the blocking block 8, a plurality of grooves 802 distributed around the cylindrical surface of the plug rod 801 are opened, and a gear 803 is rotatably installed in the groove 802, and a gear 803 is fixed on the gear 803 A swing arm 804 is installed, and a slot is opened at the axial position of the end wall of one side of the plug rod 801 away from the blocking block 8, and a movable block 805 arranged between multiple gears 803 is slidably installed in the slot, and a rack 806 meshing with the gear 803 is assembled on the cylindrical surface of the movable block 805. A tension spring 807 for elastically pulling the movable block 805 is fixedly connected in the slot, and a first magnet 808 corresponding to the first electromagnet 702 is fixedly installed in the movable block 805.

[0054] During use of the device, under the elastic pulling of the tension spring 807, the movable block 805 moves in the slot toward the blocking block 8, and with the help of the meshing of the rack 806 fixed on the outer end wall of the movable block 805 and the gear 803, the plurality of surrounding swing arms 804 are driven to deflect outward at one end close to the blocking block 8, which makes the end of the blocking mechanism away from the blocking block 8 present a conical structure. When the blocking mechanism is inserted into the insertion hole 7, the swing arm 804 is constrained by the limiting ring 701 and is squeezed and contracted into the groove 802. When the swing arm 804 passes over the limiting ring 701, the outer side loses the squeezing restriction on the swing arm 804, and with the help of the elastic pulling of the tension spring 807, the swing arm 804 is squeezed outward. The meshing of gear 803 and rack 806 drives the swing arm 804 to deflect outward and expand again, abutting against the end wall of the limiting ring 701 away from the block 8, thereby locking the blocking mechanism and ensuring the stability of the blocking mechanism installed in the socket 7. The end of the swing arm 804 away from the gear 803 is arranged as an arc structure coaxial with the gear 803, and the end wall of the limiting ring 701 away from the block 8 is arranged as a curved surface structure adapted to the arc structure of the end of the swing arm 804. This makes the two fit more closely when the swing arm 804 is deflected and supported on one side of the limiting ring 701, which is conducive to further improving the stability of the blocking mechanism installed in the socket 7.

[0055] When the blocking mechanism needs to be removed from the socket 7, the staff only needs to control the first electromagnet 702 at the bottom of the corresponding socket 7 to be energized and started, so that the first electromagnet 702 generates magnetic attraction to the first magnet 808 after being energized and started. Driven by the magnetic attraction, the first magnet 808 drives the movable block 805 to overcome the elastic pull of the tension spring 807 and move away from the blocking block 8, so that the swing arm 804 is retracted into the groove 802. In this state, the staff can pull the blocking mechanism from the outside to remove the blocking mechanism from the socket 7. During the process of removing the blocking mechanism, the swing arm 804 contracted in the groove 802 only needs to penetrate into the limit ring 701 to interrupt the power supply to the first electromagnet 702.

[0056] See also Figure 4 A second electromagnet 703 sleeved on the outside of the first electromagnet 702 is fixedly installed at the bottom of the hole of the socket 7, and a second magnet 809 corresponding to the second electromagnet 703 is fixedly installed at the end of the plug rod 801 away from the blocking block 8. During the use of the device, the second electromagnet 703 will generate a magnetic repulsive force on the second magnet 809 after being energized. When the swing arm 804 is flipped and stored in the groove 802, the repulsive force of the second electromagnet 703 on the second magnet 809 is used to push the blocking mechanism to move outside the socket 7, so that the blocking mechanism protrudes from the outside of the socket 7, which is convenient for the staff to remove the blocking mechanism.

[0057] See also Figure 5 and Fig.14 A first magnetic isolation ring 9 arranged on the inner side of the second magnet 809 is fixedly installed on the plug rod 801, and an annular groove 901 is arranged between the first magnetic isolation ring 9 and the second magnet 809, a second magnetic isolation ring 902 is slidably inserted in the annular groove 901, and a spring 903 for elastically supporting the second magnetic isolation ring 902 is fixedly installed in the annular groove 901. During the use of the device, the first magnetic isolation ring 9 and the second magnetic isolation ring 902 are made of steel, which makes the first magnetic isolation ring 9 and the second magnetic isolation ring 902 have a good magnetic isolation effect. Under the obstruction of the magnetic field, the magnetic attraction between the first electromagnet 702 and the first magnet 808, and the magnetic repulsion between the second electromagnet 703 and the second magnet 809 can be avoided, which is beneficial to ensuring the stability of the sealing mechanism during actual use. By installing the spring 903 in the ring groove 901, it is used to elastically support the second magnetic isolation ring 902, so that when the sealing mechanism is inserted into the hole 7, the second magnetic isolation ring 902 is always in contact with the bottom of the hole 7, which is beneficial to ensuring the stability of magnetic isolation through the first magnetic isolation ring 9 and the second magnetic isolation ring 902.

[0058] Working principle:

[0059] When the device is in operation, the mold 104 adapted by the staff is installed on both sides of the middle plate 103, so that the molds 104 on both sides are respectively in the first molding chamber 101 and the second molding chamber 102, and according to the shape of the corresponding mold 104, the corresponding reserved mold rod 402 and reserved block 403 are installed on the first push plate 4, and the length of the corresponding columnar push block 304 extending outside the through hole 302 is controlled by the second push plate 3. When filling the molding sand, the staff uses the docking of the docking port 201 and the sand injection port 105 to connect with the sand injection hopper 2 The external high-pressure sand-shooting device, with the help of high-pressure airflow, efficiently and comprehensively shoots the molding sand into the space formed by the first molding chamber 101 and the second molding chamber 102, and the molding sand remains in the first molding chamber 101 and the second molding chamber 102. The airflow entering the first molding chamber 101 and the second molding chamber 102 is quickly discharged outward through the first exhaust hole 60, the second exhaust hole 602, the third exhaust hole 603 and the fourth exhaust hole 605. After the molding sand is completely filled, the sand injection port 105 is closed, so that the first molding chamber 101 and the second molding chamber are 102 forms a closed space relative to the molding sand, and then the staff controls the second hydraulic push rods 5 at the left and right ends to start, driving the second push plate 3 and the first push plate 4 to move toward the middle plate 103 to squeeze the molding sand. When the second molding chamber 102 is squeezing the molding sand, the second push plate 3 will synchronously control the movement of the corresponding columnar push block 304. During the squeezing process, a corresponding flow space is provided for the molding sand inside the first molding chamber 101 to ensure that the density of the internal molding sand distribution is uniform and stable when the sand mold is formed in the first molding chamber 101. 01, the reserved block 403 installed on the first push plate 4 inside can be adapted to the shape of the mold 104 inside the first molding chamber 101, so that during the extrusion molding process, the molding sand at various positions inside the first molding chamber 101 is squeezed horizontally at a consistent distance, and finally the thickness of each part of the sand molded inside the first molding chamber 101 is consistent, and the density of the internal molding sand distribution is also ensured to be uniform. When installing the reserved mold rod 402 and the reserved block 403, the staff can complete quick disassembly and assembly through the sealing mechanism, and the operation is flexible and convenient.

[0060] The above are only the best implementation methods adopted by this application in combination with current actual needs, but the protection scope of this application is not limited to this.

Claims

1. A multi-position variable cavity extrusion plate device with exhaust function, comprising an outer frame (1), characterized in that: The outer frame (1) is provided with a first molding chamber (101) and a second molding chamber (102) which are symmetrically arranged on the left and right. A vertically arranged middle plate (103) is sandwiched between the first molding chamber (101) and the second molding chamber (102). Molds (104) are fixed on the left and right end walls of the middle plate (103). The tops of the first molding chamber (101) and the second molding chamber (102) are fixedly connected with sand injection ports (105). The outer frame (1) is provided with a plurality of molds arranged above the first molding chamber (101) and the second molding chamber (102). The sand injection hopper (2) is provided with a fixed docking port (201) adapted to the left and right sand injection ports (105) at the bottom of the sand injection hopper (2); a second vertically arranged second push plate (3) is slidably mounted in the second molding chamber (102); a second bracket (301) is fixedly mounted on a side of the second push plate (3) away from the middle plate (103); a plurality of evenly distributed through holes (302) are formed on the second push plate (3); and a first hydraulic push rod (303) corresponding to the plurality of through holes (302) is fixedly mounted on the second bracket (301). A columnar push block (304) fixedly connected to the telescopic end of the corresponding first hydraulic push rod (303) is slidably mounted in the through hole (302); the length of the columnar push block (304) protruding outside the through hole (302) matches the protrusion of the mold (104) in the second molding chamber (102); a vertically arranged first push plate (4) is slidably mounted in the first molding chamber (101); a first bracket (401) is fixedly mounted on one side of the first push plate (4) away from the middle plate (103); and a first push plate (4) is disposed on one side of the first push plate (4) close to the middle plate (103). A plurality of reserved mold rods (402) and reserved blocks (403) are installed on the side, and the reserved blocks (403) are matched with the recessed positions on the mold (104); second hydraulic push rods (5) are fixedly installed on both left and right ends of the outer frame (1); the telescopic end of the second hydraulic push rod (5) located on the left is connected to the first bracket (401), and the telescopic end of the second hydraulic push rod (5) located on the right is connected to the second bracket (301); and first exhaust holes (6) uniformly distributed around the end walls of the first molding chamber (101) and the second molding chamber (102); The end wall of the first push plate (4) close to the middle plate (103) is provided with evenly distributed plug holes (7), and the plug holes (7) are filled with a blocking mechanism, and the reserved mold rod (402) and the reserved block (403) are also fixed with a blocking mechanism, and the reserved mold rod (402) and the reserved block (403) are firmly mounted on the first push plate (4) through the blocking mechanism; A circumferentially arranged limiting ring (701) is fixedly mounted on the inner end wall of the plug hole (7), a first electromagnet (702) is fixedly mounted at the center of the bottom of the plug hole (7), the blocking mechanism comprises a blocking block (8) adapted to the inner diameter of the plug hole (7), and a plug rod (801) movably inserted into the limiting ring (701) is fixedly mounted at the axial center of the blocking block (8), a plurality of circumferentially distributed grooves (802) are provided on the cylindrical surface of the plug rod (801), and a gear (803) is rotatably mounted in the groove (802), and the gear (803) is mounted on the gear (803). A swing arm (804) is fixedly installed, a slot is opened at the axial position of the end wall of one side of the insertion rod (801) away from the blocking block (8), and a movable block (805) arranged between a plurality of gears (803) is slidably installed in the slot, a rack (806) meshing with the gear (803) is mounted on the cylindrical surface of the movable block (805), a tension spring (807) for elastically pulling the movable block (805) is fixedly connected in the slot, and a first magnet (808) corresponding to the first electromagnet (702) is fixedly installed in the movable block (805).

2. A multi-position variable cavity extrusion plate device with exhaust function according to claim 1, characterized in that: The top end of the sand injection hopper (2) is externally connected to a high-pressure sand injection device, and the sand injection hopper (2) and two docking ports (201) at its lower end are both configured as V-shaped structures, and molding sand is injected into the first molding chamber (101) and the second molding chamber (102) at high speed through high-pressure airflow.

3. A multi-position variable cavity extrusion plate device with exhaust function according to claim 1, characterized in that: A third hydraulic push rod (501) disposed transversely is fixedly mounted on the front and rear end walls of the first molding chamber (101), and a telescopic end of the third hydraulic push rod (501) is connected to the first bracket (401).

4. A multi-position variable cavity extrusion plate device with exhaust function according to claim 1, characterized in that: The columnar push block (304) is provided with evenly distributed second exhaust holes (602), and the second exhaust holes (602) transversely penetrate the left and right circular end walls of the columnar push block (304), and the first push plate (4) is provided with a plurality of evenly distributed fourth exhaust holes (605).

5. A multi-position variable cavity extrusion plate device with exhaust function according to claim 4, characterized in that: The cylindrical surface of the columnar push block (304) is provided with evenly distributed third exhaust holes (603), and the third exhaust holes (603) are connected to the second exhaust holes (602).

6. A multi-position variable cavity extrusion plate device with exhaust function according to claim 4, characterized in that: A first connecting cavity (601) communicating with the first exhaust hole (6) is formed in the end walls of the first molding chamber (101) and the second molding chamber (102); a second connecting cavity (604) communicating with the second exhaust hole (602) is formed in the second bracket (301); a connecting cover (606) communicating with the fourth exhaust hole (605) is fixedly covered on the end wall of the first push plate (4) away from the middle plate (103); and the first connecting cavity (601), the second connecting cavity (604) and the connecting cover (606) are all externally connected to a pump.

7. The multi-position variable cavity extrusion plate device with exhaust function according to claim 1, characterized in that: A second electromagnet (703) sleeved on the outside of the first electromagnet (702) is fixedly mounted on the bottom of the insertion hole (7), and a second magnet (809) corresponding to the second electromagnet (703) is fixedly mounted on one end of the insertion rod (801) away from the blocking block (8).

8. The multi-position variable cavity extrusion plate device with exhaust function according to claim 7, characterized in that: A first magnetic isolation ring (9) arranged on the inner side of the second magnet (809) is fixedly mounted on the insertion rod (801), and an annular groove (901) is arranged between the first magnetic isolation ring (9) and the second magnet (809), a second magnetic isolation ring (902) is slidably inserted in the annular groove (901), and a spring (903) for elastically supporting the second magnetic isolation ring (902) is fixedly mounted in the annular groove (901).

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