A cold-box molding machine

Abstract

The application belongs to the technical field of molding machines, and particularly relates to a cold core molding machine, which comprises a rack, a sand shooting hopper, a blowing box, an upper core box and a lower core box, a drive vehicle connected with the lower core box below the rack; the sand shooting hopper is fixedly connected with the rack, and the sand shooting hopper is fixedly connected with a sand shooting plate; both sides of the upper core box are provided with support assemblies which are overlapped with the rack; a jacking mechanism is arranged below the rack; the blowing box is slidably connected with blocking plates on both sides, the blocking plates are provided with limiting protrusions, the blowing box is provided with blowing nozzles, the blocking plates are provided with air extraction channels which penetrate through the bottom of the blocking plates, and the blocking plates are provided with air extraction holes and air extraction pipes which are communicated with the air extraction channels. The sand shooting hopper is fixed to the rack, and a movable sand shooting frame and a matched driving device are omitted. The blowing box, the sand shooting plate and the upper core box form airtight and clean cavities through the blocking plates, and the blowing nozzles and the air extraction channels can effectively clean residual core sand and collect and treat the residual core sand, so that environmental pollution is reduced.

Description

Technical Field

[0001] This invention belongs to the field of molding machine technology, and specifically relates to a cold core molding machine. Background Technology

[0002] Cold core machines are key pieces of equipment in the modern foundry industry for manufacturing sand cores. They complete sand core forming through processes such as sand injection and catalytic gas hardening. Existing cold core machines typically include a frame with transverse slide rails. Below the slide rails are core box trolleys for transporting the core boxes. Movable sand injection frames and air blowing frames are mounted on the transverse slide rails. The sand injection frame is equipped with a sand injection mechanism with a sand injection cylinder, while the air blowing frame is equipped with an air blowing mechanism with an air blowing hood. During core making, the sand injection frame is first moved above the core box. A hydraulic cylinder controls the sand injection cylinder to descend and align with the sand injection port of the core box for sand injection. After completion, the sand injection cylinder returns to its original position. Then, the sand injection frame is removed, and the air blowing frame is moved above the core box. A hydraulic cylinder then controls the air blowing hood to descend, blowing triethylamine gas into the core box to harden the sand core, finally completing the mold removal process.

[0003] However, this existing technology has significant drawbacks: the sand-shooting and air-blowing processes each rely on independent hydraulic cylinders to drive the actuators, resulting in a large number of drive components required for the equipment. This not only increases the manufacturing cost but also raises the probability of malfunctions and the difficulty of maintenance. Furthermore, core sand and impurities accumulate on the sand-shooting plate, upper core box, and lower core box during operation, and failure to clean them in a timely manner will affect normal molding operations. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a cold core molding machine that enables sand injection and air blowing hardening to be completed sequentially in the same station, thereby reducing the number of drive components; at the same time, it can clean the attached core sand and impurities.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0006] A cold core molding machine includes a frame, a sand-shooting hopper, an air-blowing box, an upper core box, and a lower core box. A drive vehicle is connected to the lower core box below the frame. The sand-shooting hopper is fixedly connected to the frame, and a sand-shooting plate is fixedly connected to the sand-shooting hopper. A pushing mechanism is provided on the frame to move the air-blowing box below the sand-shooting hopper. Support components that overlap with the frame are provided on both sides of the upper core box. A lifting mechanism is provided below the frame to lift the drive vehicle.

[0007] The air blowing box has outer edges on both sides, and crossbars on the frame support the outer edges. A sealing plate is slidably connected to both sides of the air blowing box, and a limiting protrusion is provided on the sealing plate. The air blowing box has a blowing nozzle, and the sealing plate has an air extraction channel that extends through the bottom of the sealing plate. The sealing plate has an air extraction hole and an air extraction pipe communicating with the air extraction channel. A baffle plate is fixedly connected to the air blowing box to block the air extraction hole. When the upper surface of the sealing plate contacts the sand-shooting plate, a cleaning chamber is formed between the air blowing box and the sand-shooting plate, and the air extraction hole is not blocked by the baffle plate.

[0008] The bottom of the drive vehicle is equipped with electric track wheels; a first track and a second track connected to the electric track wheels are respectively provided under the frame and on the lifting mechanism.

[0009] It also includes a limiting chip removal mechanism; the limiting chip removal mechanism is located at the first track; the limiting chip removal mechanism includes a lifting plate and a first limiting block, the lifting plate is connected to a lifting cylinder; there are two first limiting blocks, there is a gap between the two first limiting blocks and they are fixed to the lifting plate; the drive vehicle is provided with a limiting shaft that cooperates with the first limiting block; the lower core box is provided with a chip removal groove and a chip removal channel, the chip removal channel is connected to the chip removal groove; the upper core box is provided with a sealing block that is inserted into the chip removal groove; the bottom of the chip removal channel is provided with a sealing element; the first limiting block is provided with an open pipe that cooperates with the sealing element, and the first limiting block is provided with a chip removal pipe that is connected to the open pipe.

[0010] The pushing mechanism includes a support rail and a pushing cylinder; the support rail is fixedly connected to the frame; the air blowing box is slidably connected to the support rail; the cylinder body of the pushing cylinder is fixedly connected to the support rail, and the piston rod end of the pushing cylinder is slidably connected to the air blowing box.

[0011] The support assembly includes a support frame, a support cylinder, and a support plate; the support frame is fixedly connected to the upper core box, the support plate is slidably connected to the support frame, and a first spring is provided between the support plate and the support frame;

[0012] A transmission plate is slidably connected to the support frame, and the two ends of the support cylinder are respectively connected to the transmission plate and the support frame; a limit pin is fixedly connected to the transmission plate, and an inclined groove is provided on the support plate, with the limit pin slidably connected to the inclined groove.

[0013] A hook plate is fixedly connected to the transmission plate; the air blowing box is provided with a hook groove that connects to the hook plate.

[0014] The lifting mechanism includes a lifting seat and lifting cylinders, with at least two lifting cylinders; a lifting plate is slidably connected to the lifting seat, and the piston rod end of the lifting cylinder is fixedly connected to the lifting plate; the lifting plate is provided with a support protrusion that contacts the bottom of the driving vehicle.

[0015] The lifting plate is provided with two second limiting blocks, and there is a gap between the two second limiting blocks.

[0016] An air blowing plate is slidably connected inside the air blowing box, and a second spring is provided between the air blowing plate and the air blowing box; the inside of the air blowing plate is an air cavity, and the bottom of the air blowing plate is provided with an air blowing pipe communicating with the air cavity, and the bottom of the air blowing box is provided with a through hole that cooperates with the air blowing pipe; the air blowing plate is provided with an air supply pipe communicating with the air cavity, and one end of the air supply pipe extends out through the air blowing box.

[0017] The air blowing plate is fixedly connected to a connecting shaft; one end of the connecting shaft extends through the air blowing box; when the connecting shaft contacts the sand shooting plate, the connecting shaft pushes the air blowing plate downward.

[0018] Compared with the prior art, the beneficial effects of this invention are:

[0019] The sand-shooting bucket is fixed to the frame, eliminating the need for a mobile sand-shooting frame and its associated drive device; the air-blowing box moves laterally through a pushing mechanism and works in conjunction with the lifting mechanism to complete lifting and sealing, significantly reducing the number of hydraulic cylinders used and lowering manufacturing costs and control system complexity.

[0020] The process of sand injection filling, air blowing hardening and sand core removal is completed sequentially using the same lifting mechanism, which improves the continuity of equipment operation and production efficiency.

[0021] The air blowing box, sand-shooting plate, and upper core box are connected by a sealing plate to form a closed cleaning chamber. Combined with the blowing nozzle and air extraction channel, it can effectively clean and collect residual core sand, reducing environmental pollution.

[0022] The limiting chip removal mechanism uses a guide ramp and a limiting shaft to automatically correct and lock the core box position during lifting, ensuring accuracy. During chip removal, it automatically forms a closed negative pressure channel to directly remove waste chips, ensuring product quality and environmental hygiene.

[0023] The support components facilitate easy connection between the upper core box and the rack. Furthermore, two methods for replacing the upper core box are provided, greatly improving maintenance efficiency and flexibility.

[0024] The elastic compression design ensures a tight connection between the air blowing tube and the core box, effectively preventing gas leakage and improving safety and gas utilization. Attached Figure Description

[0025] Figure 1 This is an isometric view of the present invention;

[0026] Figure 2 This is the front view of the present invention;

[0027] Figure 3 yes Figure 2 A magnified view of a section at point A in the middle;

[0028] Figure 4This is an isometric view of the half-section structure of the present invention;

[0029] Figure 5 yes Figure 4 A magnified view of a section at point E in the middle;

[0030] Figure 6 yes Figure 4 The front view of the structure shown;

[0031] Figure 7 yes Figure 6 A magnified view of a section at point B in the middle;

[0032] Figure 8 yes Figure 6 A magnified view of a section at point C;

[0033] Figure 9 yes Figure 6 A magnified view of a section at point D;

[0034] Figure 10 This is a schematic diagram of the structure of the upper core box of the present invention;

[0035] Figure 11 This is a cross-sectional view of the upper core box of the present invention;

[0036] Figure 12 This is a schematic diagram of the air blowing box of the present invention;

[0037] Figure 13 This is a partial cross-sectional view of the air blowing box of the present invention;

[0038] Wherein: 1 is the frame, 2 is the sand-shooting hopper, 3 is the air-blowing box, 30 is the outer edge, 31 is the hook groove, 4 is the upper core box, 40 is the sealing block, 5 is the lower core box, 50 is the chip removal groove, 51 is the chip removal channel, 52 is the sealing component, 6 is the drive vehicle, 7 is the sand-shooting plate, 8 is the pushing mechanism, 80 is the support rail, 81 is the pushing cylinder, 9 is the support assembly, 90 is the support frame, 91 is the support cylinder, 92 is the support plate, 93 is the first spring, 94 is the transmission plate, 95 is the limit pin, 96 is the inclined groove, 97 is the hook plate, 10 is the lifting mechanism, 100 is the lifting seat, 101 is the lifting cylinder, 102 is the lifting plate, 103 is the support... Support protrusion, 104 is the second limiting block, 11 is the crossbar, 12 is the sealing plate, 120 is the limiting protrusion, 13 is the blowing nozzle, 14 is the air extraction channel, 15 is the air extraction hole, 16 is the air extraction pipe, 17 is the baffle, 18 is the electric track wheel, 19 is the first track, 20 is the second track, 21 is the limiting chip removal mechanism, 210 is the lifting plate, 211 is the first limiting block, 212 is the limiting shaft, 213 is the opening pipe, 214 is the chip removal pipe, 215 is the lifting cylinder, 22 is the air blowing plate, 23 is the second spring, 24 is the air blowing pipe, 25 is the air supply pipe, 26 is the connecting shaft, 27 is the air filling pipe, and 28 is the sand supply hopper. Detailed Implementation

[0039] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0040] like Figure 1 and 2 As shown, a cold core molding machine includes a frame 1, a sand-shooting hopper 2, an air-blowing box 3, an upper core box 4, and a lower core box 5. A drive vehicle 6 is connected to the lower core box 5 below the frame 1; the drive vehicle 6 moves the lower core box 5. The sand-shooting hopper 2 is fixedly connected to the frame 1, and a sand-shooting plate 7 is fixedly connected to the sand-shooting hopper 2. The sand-shooting hopper 2 is also connected to a sand supply hopper 28 and an air supply pipe 27. The sand supply hopper 28 feeds core sand into the sand-shooting hopper 2; compressed air passes through the air supply pipe 27, and the compressed air propels the core sand in the sand-shooting hopper 2 out through the nozzle on the sand-shooting plate 7.

[0041] The sand-shooting hopper 2 in this cold core machine is fixed in position and does not need to be moved compared to existing technologies, which eliminates the need for complex structural settings; the sand supply hopper 28 and the air supply pipe 27 are directly connected to the sand-shooting hopper 2 (only valves are installed at the connection point for control), the overall structure is simple, and the risk of leakage is reduced.

[0042] A pushing mechanism 8 is provided on the frame 1. When gas hardening is required, the pushing mechanism 8 moves the air blowing box 3 to below the sand shooting bucket 2. At the same time, outer edges 30 are provided on both sides of the air blowing box 3, and crossbars 11 on the frame 1 are used to support the outer edges 30. After the air blowing box 3 is moved to below the sand shooting bucket 2, it can be supported by the crossbars 11. That is, the air blowing box 3 is placed on the crossbars 11, and it can be lifted up when it is pushed upward.

[0043] Similarly, support components 9 are provided on both sides of the upper core box 4 to overlap with the frame 1. That is, the upper core box 4 is placed on the frame 1, and when it is subjected to an upward thrust, it can be lifted up and fit against the sand-shooting plate 7. A lifting mechanism 10 is provided below the frame 1 to lift the drive vehicle 6.

[0044] The working principle of this cold core machine is as follows:

[0045] Step 1, Sand Filling: After the drive vehicle 6 moves the lower core box 5 below the sand-shooting hopper 2, the lifting mechanism 10 lifts the drive vehicle 6 and the lower core box 5 until the upper core box 4 is lifted and fits against the sand-shooting plate 7. The nozzle on the sand-shooting plate 7 extends into the hole on the upper core box 4. Compressed air forces the core sand in the sand-shooting hopper 2 through the nozzle on the sand-shooting plate 7 and into the cavity formed by the lower core box 5 and the upper core box 4 through the hole in the upper core box 4.

[0046] Step 2, Gas Hardening: The lifting mechanism 10 descends until a gap exists between the upper core box 4 and the sand-shooting plate 7; the pushing mechanism 8 moves the air-blowing box 3 between the upper core box 4 and the sand-shooting plate 7. The lifting mechanism 10 lifts again until the air-blowing box 3 is lifted, with its upper end abutting against the sand-shooting plate 7 and its lower end abutting against the upper core box 4. The catalytic gas inside the air-blowing box 3 enters the cavity formed by the lower core box 5 and the upper core box 4, hardening the sand core inside the cavity.

[0047] Step 3, core removal: The lifting mechanism 10 descends, so that the outer edge 30 of the air blowing box 3 contacts the crossbar 11 and the upper core box 4 overlaps with the frame 1; then the pushing mechanism 8 drives the air blowing box 3 to reset, and then the drive vehicle 6 drives the lower core box 5 to move and reset; the worker removes the sand core from the lower core box 5.

[0048] A sealing plate 12 is slidably connected to both sides of the air-blowing box 3. The sealing plate 12 is provided with a limiting protrusion 120, which contacts the air-blowing box 3 to limit the downward movement of the limiting protrusion 120. The sliding arrangement of the sealing plate 12 is to prevent it from colliding with the nozzle on the sand-shooting plate 7 during movement.

[0049] like Figures 3 to 7 As shown, a purge nozzle 13 is provided on the air blowing box 3, and the purge nozzle 13 is inclined towards the sand-shooting plate 7. The purge nozzle 13 is connected to an air pump, and air can be sprayed out through the purge nozzle 13 to clean the core sand remaining on the sand-shooting plate 7. The sealing plate 12 is provided with an air extraction channel 14, which runs through the bottom of the sealing plate 12. The sealing plate 12 is provided with an air extraction hole 15 and an air extraction pipe 16 connected to the air extraction channel 14. A baffle 17 for sealing the air extraction hole 15 is fixedly connected to the air blowing box 3. The air extraction pipe 16 is a flexible hose and is connected to an air extraction pump. The cleaned core sand is extracted by the air extraction pump; it can be pumped to filtration and dust removal equipment as needed. Specifically, the number of air extraction channels 14 can be set according to the actual situation. Each air extraction channel 14 is provided with an air extraction hole 15 and an air extraction pipe 16.

[0050] During the second step of the operation, as the air blowing box 3 is lifted, the bottom of the sealing plate 12 contacts the upper core box 4 and is lifted up. Finally, the upper surface of the sealing plate 12 contacts the sand-shooting plate 7, forming a cleaning chamber between the air blowing box 3 and the sand-shooting plate 7. Simultaneously, because the sealing plate 12 is lifted, its suction port 15 is not blocked by the baffle 17, while the bottom of the suction channel 14 is blocked by the top surface of the upper core box 4. The core sand cleaned within the cleaning chamber is discharged through the suction port 15, the suction channel 14, and the suction pipe 16.

[0051] During the third step of the operation, after the outer edge 30 of the air blowing box 3 comes into contact with the crossbar 11, the sealing plate 12 moves down and resets under the action of gravity; the air extraction hole 15 on it is blocked by the sealing plate 12, while there is a gap between the bottom of the air extraction channel 14 and the top surface of the upper core box 4, that is, the bottom of the air extraction channel 14 is not blocked.

[0052] During the resetting process of the air box 3, the purge nozzle 13 does not work, but the air pump is still in operation; the core sand on the surface of the upper core box 4 is discharged into the air extraction channel 14 through the bottom of the air extraction channel 14 and finally discharged through the air extraction pipe 16.

[0053] Furthermore, such as Figure 1 As shown, the bottom of the drive vehicle 6 is equipped with electric track wheels 18, and a first track 19 and a second track 20 connected to the electric track wheels 18 are respectively provided below the frame 1 and on the lifting mechanism 10. Power is provided by the electric track wheels 18, enabling the drive vehicle 6 to move along the first track 19 and the second track 20. During the first and second steps of operation, the drive vehicle 6 moves onto the wheels on the second track 20; during the third step of operation, the drive vehicle 6 moves onto the first track 19.

[0054] Furthermore, such as Figure 1 , Figure 4 , Figure 6 and Figure 9 As shown, it also includes a limiting chip removal mechanism 21; the limiting chip removal mechanism 21 is located at the first track 19. During the third step of the operation, after the worker removes the sand core, he needs to use an air gun to blow away any remaining impurities in the lower core box 5 to avoid affecting the next molding.

[0055] The limiting chip removal mechanism 21 includes a lifting plate 210 and a first limiting block 211. The lifting plate 210 is connected to a lifting cylinder 215. The cylinder body of the lifting cylinder 215 is fixed to the ground. The piston rod of the lifting cylinder 215 is fixedly connected to the lifting plate 210. The lifting plate 210 is lifted and lowered by extending and retracting the piston rod of the lifting cylinder 215.

[0056] Two first limiting blocks 211 are provided, and each first limiting block 211 has a guide slope. The two first limiting blocks 211 are spaced apart and fixed to the lifting plate 210. The drive vehicle 6 is provided with a limiting shaft 212 that cooperates with the first limiting blocks 211. During the lifting process of the lifting plate 210, the limiting shaft 212 is guided by the guide slope on the first limiting block 211, so that the limiting shaft 212 is positioned between the two first limiting blocks 211 and limits its movement.

[0057] The lower core box 5 is provided with a chip removal groove 50 and a chip removal channel 51, and the chip removal channel 51 is connected to the chip removal groove 50; the upper core box 4 is provided with a sealing block 40 that is inserted into the chip removal groove 50. During the first and second steps of operation, the sealing block 40 is in an inserted and sealed state with the chip removal groove 50, which can prevent the core sand from flowing into the chip removal groove 50 and does not affect normal operation.

[0058] A sealing element 52 is provided at the bottom of the chip removal channel 51. The sealing element 52 is specifically composed of two inclined rubber plates. When no external force is applied, the tops of the two rubber plates fit together to achieve a sealing effect. The first limiting block 211 is provided with an open tube 213 that cooperates with the sealing element 52. When the lifting plate 210 is raised, the open tube 213 is inserted into the chip removal channel 51 and pushes the two rubber plates apart, so that the chip removal channel 51 and the open tube 213 are in a connected state.

[0059] A chip removal pipe 214, connected to the open pipe 213, is provided on the first limiting block 211. The chip removal pipe 214 is connected to an air pump. When the air gun blows away residual impurities in the lower core box 5, air is drawn by the air pump, causing the blown-up impurities to be discharged through the chip removal groove 50, chip removal channel 51, open pipe 213, and chip removal pipe 214. This process effectively prevents impurities from falling to the ground or into the air during air gun blowing.

[0060] Furthermore, such as Figure 1 and Figure 12 As shown, the pushing mechanism 8 includes a support rail 80 and a pushing cylinder 81; the support rail 80 is fixedly connected to the frame 1; the air blowing box 3 is slidably connected to the support rail 80; the cylinder body of the pushing cylinder 81 is fixedly connected to the support rail 80, and the piston rod end of the pushing cylinder 81 is slidably connected to the air blowing box 3. The side of the air blowing box 3 is provided with a sliding groove with an opening at the lower end. After the air blowing box 3 is lifted, it will separate from the piston rod end; after the air blowing box 3 is lowered, it will reconnect to the piston rod end.

[0061] Furthermore, such as Figure 10 and 11 As shown, the support assembly 9 includes a support frame 90, a support cylinder 91, and a support plate 92; the support frame 90 is fixedly connected to the upper core box 4, the support plate 92 is slidably connected to the support frame 90, and a first spring 93 is provided between the support plate 92 and the support frame 90, the first spring 93 being in a pre-compressed state.

[0062] A transmission plate 94 is slidably connected to the support frame 90. The two ends of the support cylinder 91 are connected to the transmission plate 94 and the support frame 90 respectively. A limit pin 95 is fixedly connected to the transmission plate 94. A groove 96 is provided on the support plate 92. The limit pin 95 is slidably connected to the groove 96.

[0063] The extension of the support cylinder 91 drives the transmission plate 94 to move, and the limiting pin 95 moves in the inclined groove 96. Through the cooperation of the limiting pin 95 and the inclined groove 96 and the elastic potential energy of the first spring 93, the support plate 92 extends out and overlaps with the frame.

[0064] When the upper core box 4 needs to be replaced, the lifting mechanism 10 lifts the drive vehicle 6 and its lower core box 5 to fit against the upper core box 4; then, the support cylinder 91 retracts, and the support plate 92 retracts through the cooperation of the limit pin 95 and the inclined groove 96. Afterwards, the lifting mechanism 10 moves the lower core box 5 and the upper core box 4 downwards; finally, the drive vehicle 6 moves the lower core box 5 and the upper core box 4 out, and the upper core box 4 can then be replaced.

[0065] Furthermore, in addition to the above method of removing the upper core box 4, the following structural settings can also be adopted; the specific method of removing the upper core box 4 can be selected according to the site layout requirements.

[0066] like Figure 10 and Figure 12 As shown, a hook plate 97 is fixedly connected to the transmission plate 94; the air blowing box 3 is provided with a hook groove 31 that connects to the hook plate 97. The hook plate 97 is shaped like the number "7". During the process of the upper core box 4 being lifted and contacting the air blowing box 3, the side of the hook plate 97 can contact the side of the hook groove 31, thereby playing a guiding role. When the upper core box 4 needs to be replaced, the support cylinder 91 retracts and drives the transmission plate 94 to move together, so that the hook plate 97 hooks the hook groove 31; when the air blowing box 3 moves and resets, it will drive the upper core box 4 to move together, thereby removing the upper core box 4.

[0067] Therefore, this device can remove the upper core box 4 by driving the vehicle 6 or by blowing the air box 3.

[0068] Furthermore, such as Figure 1 , Figure 4 , Figure 6 and Figure 8 As shown, the lifting mechanism 10 includes a lifting seat 100 and lifting cylinders 101. At least two lifting cylinders 101 are provided, and the cylinder bodies of the lifting cylinders 101 are fixedly connected to the ground. A lifting plate 102 is slidably connected to the lifting seat 100, and the piston rod end of the lifting cylinder 101 is fixedly connected to the lifting plate 102. The lifting plate 102 has a support protrusion 103 that contacts the bottom of the drive vehicle 6. The second track 20 is fixed to the lifting seat 100.

[0069] When the drive vehicle 6 moves onto the second track 20, the piston rod of the lifting cylinder 101 extends and pushes the lifting plate 102 until the support protrusion 103 on the lifting plate 102 contacts it, ultimately lifting the drive vehicle 6. In this way, the support protrusion 103 connects to the bottom of the drive vehicle 6's body, and during this lifting process, the electric track wheels 18 of the drive vehicle 6 are suspended in the air, with a gap between them and the second track 20. Therefore, it is possible to avoid any impact from shaking during the lifting process on the electric track wheels 18 of the drive vehicle 6.

[0070] Furthermore, such as Figure 8 As shown, two second limiting blocks 104 are provided on the lifting plate 102, and corresponding guide slopes are also provided on the two second limiting blocks 104. During the extension of the piston rod of the lifting cylinder 101, the limiting shaft 212 and the guide slopes on the second limiting blocks 104 guide the limiting shaft 212 to be positioned between the two second limiting blocks 104 to limit it; and during the guiding process, the electric track wheel 18 is on the second track 20, so the drive vehicle 6 can make fine adjustments to its position to ensure its accuracy.

[0071] Furthermore, an opening corresponding to the hole in the upper core box 4 can be made at the bottom of the air blowing box 3; once the two are fitted together, air can be blown through the air blowing box 3. However, to avoid air leakage due to insufficient fit, the following structural design is preferred:

[0072] like Figure 12 and Figure 13 As shown, an air-blowing plate 22 is slidably connected inside the air-blowing box 3, and a second spring 23 is provided between the air-blowing plate 22 and the air-blowing box 3. The interior of the air-blowing plate 22 is an air chamber, and the bottom of the air-blowing plate 22 is provided with an air-blowing pipe 24 communicating with the air chamber. The bottom of the air-blowing box 3 is provided with a through hole that mates with the air-blowing pipe 24. When the air-blowing plate 22 is subjected to pressure and the pressure decreases, the air supply pipe 25 on it will pass through the through hole and extend into the hole in the upper core box 4. The number and position of the air supply pipes 25 correspond to the holes on the upper core box 4.

[0073] An air supply pipe 25 communicating with the air chamber is provided on the air blowing plate 22. One end of the air supply pipe 25 extends through the air blowing box 3, which has a corresponding square or oblong opening. Catalytic gas enters the air chamber of the air blowing plate 22 through the air supply pipe 25, and then enters the cavity formed by the lower core box 5 and the upper core box 4 through the air blowing pipe 24, thereby hardening the sand core in the cavity.

[0074] Furthermore, a connecting shaft 26 is fixedly connected to the air blowing plate 22; one end of the connecting shaft 26 extends through the air blowing box 3. During the second step of the operation, after the connecting shaft 26 contacts the sand shooting plate 7, the connecting shaft 26 will push the air blowing plate 22 downward.

[0075] The above description only illustrates preferred embodiments of the present invention, but the present invention is not limited to the above embodiments.

Claims

1. A cold core molding machine, characterized in that: The device includes a frame (1), a sand-shooting bucket (2), an air-blowing box (3), an upper core box (4), and a lower core box (5). A drive vehicle (6) is connected to the lower core box (5) below the frame (1). The sand-shooting bucket (2) is fixedly connected to the frame (1), and a sand-shooting plate (7) is fixedly connected to the sand-shooting bucket (2). A pushing mechanism (8) is provided on the frame (1), which moves the air-blowing box (3) to the lower part of the sand-shooting bucket (2). Support components (9) that overlap with the frame (1) are provided on both sides of the upper core box (4). A lifting mechanism (10) is provided below the frame (1), which lifts the drive vehicle (6). The air blowing box (3) has outer edges (30) on both sides, and a crossbar (11) on the frame (1) is used to support the outer edges (30); the air blowing box (3) is slidably connected to the two sides of the air blowing box (3), and the sealing plate (12) is provided with a limiting protrusion (120); the air blowing box (3) is provided with a blowing nozzle (13); the sealing plate (12) is provided with an air extraction channel (14), and the air extraction channel (14) penetrates the bottom of the sealing plate (12); the sealing plate (12) is provided with an air extraction hole (15) and an air extraction pipe (16) communicating with the air extraction channel (14); the air blowing box (3) is fixedly connected with a baffle (17) for sealing the air extraction hole (15); when the upper surface of the sealing plate (12) contacts the sand-shooting plate (7), a cleaning chamber is formed between the air blowing box (3) and the sand-shooting plate (7), and the air extraction hole (15) is not blocked by the baffle (17).

2. A cold core molding machine according to claim 1, characterized in that: The bottom of the drive vehicle (6) is provided with electric track wheels (18); a first track (19) and a second track (20) connected to the electric track wheels (18) are respectively provided below the frame (1) and on the lifting mechanism (10).

3. A cold core molding machine according to claim 2, characterized in that: It also includes a limiting chip removal mechanism (21); the limiting chip removal mechanism (21) is located at the first track (19); the limiting chip removal mechanism (21) includes a lifting plate (210) and a first limiting block (211), the lifting plate (210) is connected to a lifting cylinder (215); there are two first limiting blocks (211), there is a gap between the two first limiting blocks (211) and they are fixed on the lifting plate (210); the drive vehicle (6) is provided with a limiting shaft (2) that cooperates with the first limiting block (211). 12); The lower core box (5) is provided with a chip removal groove (50) and a chip removal channel (51), and the chip removal channel (51) is connected to the chip removal groove (50); The upper core box (4) is provided with a sealing block (40) that is inserted into the chip removal groove (50); The bottom of the chip removal channel (51) is provided with a sealing element (52); The first limiting block (211) is provided with an opening pipe (213) that cooperates with the sealing element (52), and the first limiting block (211) is provided with a chip removal pipe (214) that is connected to the opening pipe (213).

4. A cold core molding machine according to claim 1, characterized in that: The pushing mechanism (8) includes a support rail (80) and a pushing cylinder (81); the support rail (80) is fixedly connected to the frame (1); the air blowing box (3) is slidably connected to the support rail (80); the cylinder body of the pushing cylinder (81) is fixedly connected to the support rail (80), and the piston rod end of the pushing cylinder (81) is slidably connected to the air blowing box (3).

5. A cold core molding machine according to claim 3, characterized in that: The support assembly (9) includes a support frame (90), a support cylinder (91), and a support plate (92); the support frame (90) is fixedly connected to the upper core box (4), the support plate (92) is slidably connected to the support frame (90), and a first spring (93) is provided between the support plate (92) and the support frame (90). A transmission plate (94) is slidably connected to the support frame (90), and the two ends of the support cylinder (91) are respectively connected to the transmission plate (94) and the support frame (90); a limit pin (95) is fixedly connected to the transmission plate (94), and a groove (96) is provided on the support plate (92), and the limit pin (95) is slidably connected to the groove (96).

6. A cold core molding machine according to claim 5, characterized in that: A hook plate (97) is fixedly connected to the transmission plate (94); the air blowing box (3) is provided with a hook groove (31) that is connected to the hook plate (97).

7. A cold core molding machine according to claim 3, characterized in that: The lifting mechanism (10) includes a lifting seat (100) and a lifting cylinder (101), and there are at least two lifting cylinders (101); a lifting plate (102) is slidably connected to the lifting seat (100), and the piston rod end of the lifting cylinder (101) is fixedly connected to the lifting plate (102); the lifting plate (102) is provided with a support protrusion (103) that contacts the bottom of the drive vehicle (6).

8. A cold core molding machine according to claim 7, characterized in that: The lifting plate (102) is provided with two second limiting blocks (104), and there is a gap between the two second limiting blocks (104).

9. A cold core molding machine according to claim 1, characterized in that: An air blowing plate (22) is slidably connected inside the air blowing box (3), and a second spring (23) is provided between the air blowing plate (22) and the air blowing box (3); the inside of the air blowing plate (22) is an air chamber, and the bottom of the air blowing plate (22) is provided with an air blowing pipe (24) communicating with the air chamber, and the bottom of the air blowing box (3) is provided with a through hole that cooperates with the air blowing pipe (24); the air blowing plate (22) is provided with an air supply pipe (25) communicating with the air chamber, and one end of the air supply pipe (25) extends through the air blowing box (3).

10. A cold core molding machine according to claim 9, characterized in that: The air blowing plate (22) is fixedly connected to a connecting shaft (26); one end of the connecting shaft (26) extends through the air blowing box (3); when the connecting shaft (26) contacts the sand shooting plate (7), the connecting shaft (26) pushes the air blowing plate (22) down.

Images