A core replacing machine for elbow casting mold

Abstract

The application belongs to the technical field of pipe casting and discloses a mold core replacing machine for a bent pipe casting mold, which comprises a base, a mold mechanism, an electric hydraulic rod, an inclined clamping groove and a limiting hole, the inner cavities at the top and the middle of the base are movably connected with a frame-shaped frame and a supporting table respectively, and the inner cavities at the four corners of the supporting table are movably connected with limiting vertical rods. The frame-shaped frame, the supporting table, the inclined clamping block and the limiting column are matched with each other, so that the device is more quickly and safely disassembled. The electric hydraulic rod is operated, and the limiting of the limiting vertical rods makes the supporting table move downward. At this time, the downward movement of the supporting table drives the double-sided inclined block to move downward, so that the inclined clamping block is clamped into the inner part of the inclined clamping groove, and then the inclined clamping block drives the inclined clamping groove to move downward, thereby achieving the disassembly of the lower mold and the upper mold, and improving the safety of the operator during operation.

Description

Technical Field

[0001] This invention belongs to the field of pipe casting technology, specifically a core replacement machine for casting molds of bent pipe fittings. Background Technology

[0002] Casting is the process of injecting prepared casting materials into a mold to solidify them and obtain a product similar to the mold cavity. The raw materials for casting can be monomers, slurries that have undergone preliminary polymerization or condensation, or solutions of polymers and monomers, or liquid metal that has been melted at high temperatures. Currently, people often use casting to produce seamless bent pipes.

[0003] Currently, when producing bent pipe fittings of the same diameter and size but different wall thicknesses, it is often necessary to open the mold before replacing the mold core inside the casting mold. Currently, people often disassemble the two halves of the mold by inserting a pry bar between them and then prying it open. However, this method often causes the pry bar to slip while separating the two halves, potentially leading to injury. Therefore, a mold core replacement machine for bent pipe fitting casting molds is proposed to solve the problems mentioned in the background art. Summary of the Invention

[0004] To address the problems mentioned in the background art, the present invention provides a core replacement machine for casting molds of bent pipe fittings, which solves the problem that it is dangerous to disassemble the mold using a pry bar.

[0005] To achieve the above objectives, the present invention provides the following technical solution: including a base, a mold mechanism, a slanted locking block, an electro-hydraulic rod, a slanted locking groove, and a limiting hole. The inner cavities at the top and middle of the base are respectively movably locked with a frame and a support platform. The inner cavities at the four corners of the support platform are movably connected with limiting vertical rods. The inner cavities at the front and rear ends of the support platform are movably locked with slanted locking blocks. The upper and lower surfaces of the slanted locking blocks are provided with first spring pieces. The inner cavity at the top of the base is movably connected with a double-sided slanted block located directly above the slanted locking block. The inner cavities on both sides of the frame are movably connected with U-shaped frames. The two ends of the U-shaped frames that are close to each other are fixedly connected with limiting columns. The outer surface of the limiting columns is sleeved with a first tension spring.

[0006] The mold mechanism includes a lower mold, which is placed on the top of the support platform. An upper mold is movably engaged with the top of the lower mold. A slanted slot is opened on the lower mold near the slanted block. A limiting hole is opened on the upper mold near the limiting post. A mold core mechanism is movably connected to both sides of the inner cavity of the lower mold. An opening mechanism is movably connected to the front end of the bottom of the inner cavity of the base.

[0007] Preferably, the mold core mechanism includes a block and a Y-shaped pipe. The lower middle part of the block is movably connected to the inner cavity of the lower mold. A limiting plate and a second protrusion are movably connected to the inner cavity of the block. A first protrusion is movably engaged in the inner cavity of the limiting plate. A first spring is fixedly connected to the side of the first protrusion away from the second protrusion. A piston is movably connected to the inner cavity of the middle of the lower mold. A second spring is fixedly connected to the top of the piston. Third protrusions are movably connected to both sides of the inner cavity of the lower mold. A top rod located directly below the piston is fixedly connected to the bottom of the inner cavity of the base. A mold core rod is fixedly connected to the front end of the block. A third spring and an arc-shaped plug are sleeved on the outer surface of the mold core rod.

[0008] Preferably, the opening mechanism includes a stopper rod and a telescopic rod. The outer surface of the lower part of the stopper rod is movably connected to the inner cavity of the base. A second tension spring is sleeved on the outer surface of the stopper rod. A connecting pipe is fixedly connected to the inner cavity of the base on the side away from the stopper rod. An outer rod is hinged to the inner cavity of the base on the side away from the stopper rod. An inner rod is movably connected to the inner cavity of the outer rod. Second spring pieces are provided in the inner cavities on both sides of the top of the base.

[0009] Preferably, the side of the mold mechanism mates with the inner cavity of the frame, the top and bottom of the electro-hydraulic rod are fixedly connected to the support platform and the base respectively, the top and bottom of the limiting vertical rod are fixedly connected to the base, the inner cavity of the base above the inclined block is inclined and mates with the inclined block, the inclined slot is located below the inner side of the inclined block, and the inclined block and the inclined slot engage with each other, and the two ends of the first spring piece are fixedly connected to the base and the inclined block respectively.

[0010] Preferably, the top of the double-sided inclined block penetrates the base and the frame and extends into the interior of the frame; the bottom of the double-sided inclined block is fixedly connected to the support platform; the two ends of the U-shaped frame are inclined on one side near the double-sided inclined block and cooperate with the inclined surface on the double-sided inclined block; the end of the limiting post near the upper mold is provided with a rounded chamfer and penetrates the side wall of the frame and is engaged with the limiting hole; the two ends of the first tension spring are fixedly connected to the U-shaped frame and the frame respectively.

[0011] Preferably, the upper middle part of the outer surface of the block is movably connected to the inner cavity of the upper mold, the end of the limiting plate away from the block is fixedly connected to the lower mold, the end of the first protrusion away from the first spring penetrates the side wall of the limiting plate and is engaged with the inner cavity of the block, the end of the first spring away from the first protrusion is fixedly connected to the limiting plate, the end of the second protrusion away from the first protrusion penetrates the side wall of the block and is engaged with the inner cavity of the lower mold, and the ends of the first protrusion and the second protrusion that are close to each other are in contact.

[0012] Preferably, one end of the top of the push rod passes through the support platform and the lower mold and extends into the interior of the lower mold and engages with the bottom of the piston column, and the top of the second spring is fixedly connected to the lower mold.

[0013] Preferably, the upper and lower surfaces of the mold core rod, the third spring, and the arc-shaped plug are respectively engaged with the upper mold and the lower mold. The two ends of the third spring are respectively fixedly connected to the mold core rod and the arc-shaped plug. The end of the mold core rod away from the block is in contact with the inner wall of the lower mold and the upper mold. The end of the arc-shaped plug away from the third spring is in contact with the upper mold and the lower mold. The upper and lower parts of the Y-shaped pipe are respectively opened on the upper mold and the lower mold. The two ends of the Y-shaped pipe near the block are respectively connected to the inner cavities on both sides of the lower mold and the upper mold.

[0014] Preferably, the top of the stopper rod is pressed against the bottom of the support platform, the top and bottom of the second tension spring are fixedly connected to the base and the stopper rod respectively, and one end of the top of the connecting tube communicates with the inner cavity of the outer rod.

[0015] Preferably, the end of the inner rod away from the outer rod is hinged to the side of the telescopic rod near the outer rod, the bottom and top of the telescopic rod are respectively hinged to the base and the frame, and the two ends of the second spring are respectively fixedly connected to the base and the frame.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] This invention utilizes the cooperation between a frame, support platform, inclined blocks, and limiting columns to enable faster and safer mold disassembly. By operating an electric hydraulic rod and using a limiting vertical rod, the support platform moves downwards. This downward movement of the support platform causes the double-sided inclined blocks to move downwards, simultaneously releasing the pressure on the U-shaped frames on both sides. Meanwhile, the tension of the first tension spring causes the U-shaped frames to engage the limiting columns within the limiting holes, securing them in place. As the support platform descends, the inclined surface at the top of the base cavity releases the pressure on the inclined blocks. Combined with the elastic force of the first spring plate, the inclined blocks engage with the inclined slots, causing the inclined blocks to move downwards along the inclined slots. This achieves the disassembly of the lower and upper molds, improving operator safety during operation.

[0018] This invention utilizes the cooperation between the first protrusion, the second protrusion, the third protrusion, and the piston column to facilitate the release of the mold core. By moving the support platform downwards, the top of the push rod presses against the bottom of the piston column, thereby increasing the pressure of the gas inside the lower mold. This causes the end of the third protrusion away from the piston column to press the second protrusion into the interior of the block. Simultaneously, the second protrusion presses against the first protrusion, causing the first protrusion to move precisely into the interior of the limiting plate. This releases the block from the mold core, facilitating subsequent replacement of the mold core.

[0019] This invention utilizes the cooperation between structures such as a stopper rod, a telescopic rod, an inner rod, and an outer rod to facilitate the misalignment of the upper and lower molds for core replacement. The downward movement of the support platform compresses the top of the stopper rod, causing it to move downwards and compress the gas inside the base. This gas is then transported through a connecting pipe to the inner cavity of the outer rod, extending the length of the inner and outer rods. This causes the telescopic rod to tilt, resulting in one end of the telescopic rod driving the frame, which in turn moves the upper mold outwards, exposing the top of the lower mold for core replacement. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a side cross-sectional view of the present invention;

[0022] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0023] Figure 4 for Figure 2 Enlarged view of point B in the middle;

[0024] Figure 5 This is a schematic diagram of the top cross-sectional structure at the limiting column of the present invention;

[0025] Figure 6 This is a front cross-sectional view of the double-sided inclined block of the present invention.

[0026] Figure 7 This is a schematic diagram of the top cross-sectional structure of the block portion of the present invention;

[0027] Figure 8 For the present invention Figure 7 Enlarged view of point C in the middle;

[0028] Figure 9 This is a schematic diagram of the cross-sectional structure of the block portion of the present invention and its enlarged view;

[0029] Figure 10 This is a schematic diagram of the mating structure at the arc-shaped plug of the present invention;

[0030] Figure 11 This is an exploded view of the core rod of the present invention;

[0031] Figure 12 This is an exploded view of the U-shaped frame of the present invention;

[0032] Figure 13 This is an exploded view of the second protrusion of the present invention.

[0033] In the diagram: 1. Base; 2. Mold mechanism; 201. Lower mold; 202. Upper mold; 3. Frame; 4. Support platform; 5. Angled block; 6. Electro-hydraulic rod; 7. Limiting vertical rod; 8. Angled slot; 9. First spring; 10. Double-sided inclined block; 11. U-shaped frame; 12. Limiting post; 13. First tension spring; 14. Limiting hole; 15. Mold core mechanism; 151. Block; 152. Limiting plate; 153. First protruding post; 154. 155. First spring; 156. Second protrusion; 157. Third protrusion; 158. Piston column; 159. Second spring; 150. Push rod; 1510. Mold core rod; 1511. Third spring; 1512. Arc-shaped plug; 1513. Y-shaped pipe; 16. Opening mechanism; 161. Plug rod; 162. Second tension spring; 163. Connecting pipe; 164. Outer rod; 165. Inner rod; 166. Telescopic rod; 167. Second spring piece. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] like Figures 1 to 13 As shown, the present invention provides a core replacement machine for casting molds of bent pipe fittings, including a base 1, a mold mechanism 2, a slanted block 5, an electric hydraulic rod 6, a slanted slot 8, and a limiting hole 14. The inner cavities at the top and middle of the base 1 are respectively movably connected to a frame 3 and a support platform 4. The inner cavities at the four corners of the support platform 4 are movably connected to limiting vertical rods 7. The inner cavities at the front and rear ends of the support platform 4 are movably connected to slanted blocks 5. The upper and lower surfaces of the slanted blocks 5 are provided with first spring pieces 9. The inner cavity at the top of the base 1 is movably connected to a double-sided slanted block 10 located directly above the slanted blocks 5. The inner cavities on both sides of the frame 3 are movably connected to U-shaped frames 11. The two ends of the U-shaped frames 11 that are close to each other are fixedly connected to limiting posts 12. The outer surface of the limiting posts 12 is sleeved with a first tension spring 13.

[0036] The mold mechanism 2 includes a lower mold 201, which is placed on top of the support platform 4. An upper mold 202 is movably connected to the top of the lower mold 201. An inclined slot 8 is formed on the lower mold 201 near the inclined block 5. A limiting hole 14 is formed on the upper mold 202 near the limiting post 12. A mold core mechanism 15 is movably connected to both sides of the inner cavity of the lower mold 201. A cover opening mechanism 16 is movably connected to the front end of the bottom of the inner cavity of the base 1. By operating the electric hydraulic rod 6 and cooperating with the limiting vertical rod 7, the support platform 4 moves downward. At this time, the descent of the support platform 4 causes the double-sided inclined block 10 to move downward. When the double-sided inclined block 10 releases the pressure on the U-shaped frame 11 on both sides, the tension of the first tension spring 13 will cause the U-shaped frame 11 to drive the limiting column 12 into the interior of the limiting hole 14 and fix the limiting hole 14. When the support platform 4 descends, the inclined surface at the top of the inner cavity of the base 1 will release the pressure on the inclined block 5. At this time, with the action of the elasticity of the first spring 9, the inclined block 5 will be driven into the interior of the inclined slot 8, thereby causing the inclined block 5 to drive the inclined slot 8 to move downward, thereby achieving the disassembly of the lower mold 201 and the upper mold 202, improving the safety of the operator during operation.

[0037] It is worth noting that initially, the lower mold 201 and the upper mold 202 are engaged by friction. Therefore, before the inclined locking block 5 and the inclined locking groove 8 are engaged, the descent of the support platform 4 will not cause the lower mold 201 to descend.

[0038] like Figure 3 , Figure 8 , Figure 9 , Figure 10 , Figure 11 and Figure 13As shown, the core mechanism 15 includes a block 151 and a Y-shaped pipe 1513. The lower middle part of the block 151 is movably connected to the inner cavity of the lower mold 201. A limiting plate 152 and a second protrusion 155 are movably connected to the inner cavity of the block 151. A first protrusion 153 is movably engaged in the inner cavity of the limiting plate 152. A first spring 154 is fixedly connected to the side of the first protrusion 153 away from the second protrusion 155. A piston column 157 is movably connected to the inner cavity in the middle of the lower mold 201. A second spring 158 is fixedly connected to the top of the piston column 157. Third protrusions 156 are movably connected to both sides of the inner cavity of the lower mold 201. A push rod located directly below the piston column 157 is fixedly connected to the bottom of the inner cavity of the base 1. 159. A core rod 1510 is fixedly connected to the front end of block 151. A third spring 1511 and an arc-shaped plug 1512 are sleeved on the outer surface of the core rod 1510. The support platform 4 moves downward, causing the top of the push rod 159 to press the bottom of the piston column 157, thereby increasing the pressure of the gas inside the lower mold 201. This causes the end of the third protrusion 156 away from the piston column 157 to press the second protrusion 155 into the interior of block 151. At the same time, the second protrusion 155 will also press the first protrusion 153 and cause the first protrusion 153 to move into the interior of the limiting plate 152. This releases the device from the block 151, making it easier for people to replace the core rod later.

[0039] It is worth noting here that the gap between the mold core rod 1510 and the mold determines the wall thickness.

[0040] like Figure 1 , Figure 2 , Figure 4 , Figure 6 and Figure 12 As shown, the opening mechanism 16 includes a stopper rod 161 and a telescopic rod 166. The outer surface of the lower part of the stopper rod 161 is movably connected to the inner cavity of the base 1. A second tension spring 162 is sleeved on the outer surface of the stopper rod 161. A connecting pipe 163 is fixedly connected to the inner cavity of the base 1 on the side away from the stopper rod 161. An outer rod 164 is hinged to the inner cavity of the base 1 on the side away from the stopper rod 161. An inner rod 165 is movably connected to the inner cavity of the outer rod 164. Second spring pieces 167 are provided in the inner cavities on both sides of the top of the base 1. By moving the support platform 4 downward, the opening mechanism 16 can also... The pressure on the top of the stopper rod 161 causes it to move downwards, compressing the gas inside the base 1. This gas is then transported through the connecting pipe 163 to the inner cavity of the outer rod 164, causing the inner rod 165 to extend in length in conjunction with the outer rod 164. This, in turn, pushes the telescopic rod 166 to tilt, causing one end of the top of the telescopic rod 166 to drive the frame 3, which in turn causes the upper mold 202 to move to the outward side, thus exposing the top of the lower mold 201 for easy replacement of the mold core by the operator.

[0041] like Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 6 , Figure 9 and Figure 12 As shown, the side of the mold mechanism 2 is fitted with the inner cavity of the frame frame 3. The top and bottom of the electric hydraulic rod 6 are fixedly connected to the support platform 4 and the base 1, respectively. The top and bottom of the limiting vertical rod 7 are fixedly connected to the base 1. The inner cavity of the base 1 above the inclined block 5 is inclined and fits with the inclined block 5. The inclined slot 8 is located below the inner side of the inclined block 5, and the inclined block 5 and the inclined slot 8 are engaged. The two ends of the first spring piece 9 are fixedly connected to the base 1 and the inclined block 5, respectively. Through the fit between the inclined block 5 and the top inclined surface of the base 1, when the support platform 4 moves upward and drives the inclined block 5 to reset, the inclined surface on the base 1 will squeeze the inclined block 5 and make the inclined block 5 move into the interior of the support platform 4, thereby contacting the engagement between the inclined slot 8 and the inclined block 5.

[0042] like Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 6 , Figure 9 and Figure 12 As shown, the top of the double-sided inclined block 10 penetrates the base 1 and the frame 3 and extends into the interior of the frame 3. The bottom of the double-sided inclined block 10 is fixedly connected to the support platform 4. The two ends of the U-shaped frame 11 are inclined on one side near the double-sided inclined block 10 and cooperate with the inclined surface on the double-sided inclined block 10. The end of the limiting post 12 near the upper mold 202 is provided with a rounded chamfer and penetrates the side wall of the frame 3 and is engaged with the limiting hole 14. The two ends of the first tension spring 13 are fixedly connected to the U-shaped frame 11 and the frame 3 respectively. The rounded design of the limiting post 12 near the upper mold 202 prevents the first tension spring 13 from being misaligned with the limiting post 12 and unable to cooperate when the support platform 4 drives the inclined block 5 to descend a very small distance.

[0043] like Figure 3 , Figure 8 , Figure 9 , Figure 10 , Figure 11 and Figure 13As shown, the upper middle part of the outer surface of the block 151 is movably connected to the inner cavity of the upper mold 202. The end of the limiting plate 152 away from the block 151 is fixedly connected to the lower mold 201. The end of the first protrusion 153 away from the first spring 154 passes through the side wall of the limiting plate 152 and is engaged with the inner cavity of the block 151. The end of the first spring 154 away from the first protrusion 153 is fixedly connected to the limiting plate 152. The end of the second protrusion 155 away from the first protrusion 153 passes through the side wall of the block 151 and is engaged with the inner cavity of the lower mold 201. The first protrusion 153 and the second protrusion 155 are in contact at their close ends. One end of the top of the push rod 159 passes through the support platform 4 and the lower mold 201 and extends into the interior of the lower mold 201 and engages with the bottom of the piston rod 157. The top of the second spring 158 is fixedly connected to the lower mold 201. Through the cooperation between the limiting plate 152, the first protrusion 153, the first spring 154 and the mold mechanism 2, the device can engage the block 151 in two directions, thereby making the device more stable in actual use.

[0044] like Figure 3 , Figure 8 , Figure 9 , Figure 10 , Figure 11 and Figure 13 As shown, the upper and lower surfaces of the core rod 1510, the third spring 1511, and the arc-shaped plug 1512 respectively mate with the upper mold 202 and the lower mold 201. The two ends of the third spring 1511 are fixedly connected to the core rod 1510 and the arc-shaped plug 1512 respectively. The end of the core rod 1510 away from the block 151 contacts the inner walls of the lower mold 201 and the upper mold 202 respectively. The end of the arc-shaped plug 1512 away from the third spring 1511 contacts the upper mold 202 and the lower mold 201 respectively. The upper and lower portions of the Y-shaped pipe 1513 are respectively located in the upper mold. On molds 202 and 201, the two ends of the Y-shaped pipe 1513 near the block 151 are connected to the inner cavities on both sides of the lower mold 201 and the upper mold 202, respectively. Through the cooperation between the third spring 1511 and the arc plug 1512, when people need to remove the cast pipe, after removing the block 151, the mold core rod 1510, the third spring 1511 and the arc plug 1512, the arc plug 1512 will be pushed back to its original position due to the elastic force of the third spring 1511, thereby removing the cast bent pipe.

[0045] It is worth noting that the forming part of the bent pipe is only the arc-shaped part on the outer surface of the mold core rod 1510, and the arc-shaped part on the outer surface of the mold core rod 1510 has the same center. Therefore, people can push the bent pipe to slide on the surface of the mold core rod 1510 to remove the bent pipe.

[0046] like Figure 1 , Figure 2 , Figure 4 , Figure 6 and Figure 12 As shown, the top of the stopper rod 161 is pressed against the bottom of the support platform 4. The top and bottom of the second tension spring 162 are fixedly connected to the base 1 and the stopper rod 161, respectively. One end of the top of the connecting tube 163 is connected to the inner cavity of the outer rod 164. The end of the inner rod 165 away from the outer rod 164 is hinged to the side of the telescopic rod 166 near the outer rod 164. The bottom and top of the telescopic rod 166 are hinged to the base 1 and the frame 3, respectively. The two ends of the second spring 167 are fixedly connected to the base 1 and the frame 3, respectively. The elastic force of the second tension spring 162 and the second spring 167 will reset the frame 3 and the stopper rod 161 when the electric hydraulic rod 6 rises.

[0047] It is worth noting that when the frame 3 moves to the outward side, the length of the telescopic rod 166 will extend synchronously.

[0048] Working principle and usage process of this invention:

[0049] First, the operator places the mold mechanism 2 above the support platform 4 inside the base 1. Then, the operator operates the electric hydraulic rod 6 and, in conjunction with the limiting vertical rod 7, moves the support platform 4 downward. At this time, the descent of the support platform 4 causes the double-sided inclined block 10 to move downward. Simultaneously, the double-sided inclined block 10 releases the pressure on the U-shaped frame 11 on both sides. At the same time, due to the tension of the first tension spring 13, the U-shaped frame 11 will cause the limiting column 12 to be inserted into the limiting hole 14 and fix the limiting hole 14. As the support platform 4 descends, the inclined surface at the top of the inner cavity of the base 1 will also release the pressure on the inclined locking block 5. At this time, in conjunction with the elastic force of the first spring piece 9, the inclined locking block 5 will be inserted into the inclined locking groove 8, thereby causing the inclined locking block 5 to move the inclined locking groove 8 downward, thus achieving the function of disassembling the lower mold 201 and the upper mold 202.

[0050] As the support platform 4 moves downward, the top of the push rod 159 presses against the bottom of the piston column 157, thereby increasing the pressure of the gas inside the lower mold 201. This causes the end of the third protrusion 156 away from the piston column 157 to press the second protrusion 155 into the interior of the block 151. At the same time, the second protrusion 155 presses against the first protrusion 153, causing the first protrusion 153 to move into the interior of the limiting plate 152. This releases the device from the block 151, making it easier for people to replace the mold core later.

[0051] As the support platform 4 moves downward, it also squeezes the top of the stopper rod 161, causing the stopper rod 161 to move downward and compress the gas inside the base 1. The gas is then transported to the inner cavity of the outer rod 164 through the connecting pipe 163, which in turn causes the inner rod 165 to extend in length in conjunction with the outer rod 164. This causes the telescopic rod 166 to tilt, and the top end of the telescopic rod 166 to drive the frame 3, which in turn causes the frame 3 to drive the upper mold 202 to move to the outward side, thereby exposing the top of the lower mold 201 so that the operator can replace the mold core.

[0052] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0053] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A core replacement machine for a casting mold of a bent pipe fitting, comprising a base (1), a slanted locking block (5), a mold mechanism (2), an electro-hydraulic rod (6), a slanted locking groove (8), and a limiting hole (14), characterized in that: The inner cavities at the top and middle of the base (1) are respectively movably connected to a frame (3) and a support platform (4). The inner cavities at the four corners of the support platform (4) are movably connected to limit rods (7). The upper and lower surfaces of the inclined block (5) are provided with first spring pieces (9). The inner cavity at the top of the base (1) is movably connected to a double-sided inclined block (10) located directly above the inclined block (5). The inner cavities on both sides of the frame (3) are movably connected to a U-shaped frame (11). The two ends of the U-shaped frame (11) that are close to each other are fixedly connected to a limiting post (12). The outer surface of the limiting post (12) is sleeved with a first tension spring (13). The mold mechanism (2) includes a lower mold (201), which is placed on the top of the support platform (4). The top of the lower mold (201) is movably connected to the upper mold (202). The inclined slot (8) is opened on the lower mold (201) near the inclined block (5). The limiting hole (14) is opened on the upper mold (202) near the limiting post (12). The mold core mechanism (15) is movably connected to both sides of the inner cavity of the lower mold (201). The front end of the bottom of the inner cavity of the base (1) is movably connected to the opening mechanism (16). The core mechanism (15) includes a block (151) and a Y-shaped pipe (1513). The lower middle part of the block (151) is movably connected to the inner cavity of the lower mold (201). A limiting plate (152) and a second protrusion (155) are movably connected to the inner cavity of the block (151). A first protrusion (153) is movably engaged in the inner cavity of the limiting plate (152). A first spring (154) is fixedly connected to the side of the first protrusion (153) away from the second protrusion (155). The inner cavity of the lower mold (201) is... A piston column (157) is movably connected to the cavity. A second spring (158) is fixedly connected to the top of the piston column (157). A third protruding column (156) is movably connected to both sides of the inner cavity of the lower mold (201). A top rod (159) located directly below the piston column (157) is fixedly connected to the bottom of the inner cavity of the base (1). A mold core rod (1510) is fixedly connected to the front end of the block (151). A third spring (1511) and an arc-shaped plug (1512) are sleeved on the outer surface of the mold core rod (1510).

2. The core replacement machine for casting molds of bent pipe fittings according to claim 1, characterized in that: The opening mechanism (16) includes a stopper rod (161) and a telescopic rod (166). The outer surface of the lower part of the stopper rod (161) is movably connected to the inner cavity of the base (1). A second tension spring (162) is sleeved on the outer surface of the stopper rod (161). A connecting pipe (163) is fixedly connected to the inner cavity of the base (1) on the side away from the stopper rod (161). An outer rod (164) is hinged to the inner cavity of the base (1) on the side away from the stopper rod (161). An inner rod (165) is movably connected to the inner cavity of the outer rod (164). A second spring plate (167) is provided in the inner cavities on both sides of the top of the base (1).

3. The core replacement machine for casting molds of bent pipe fittings according to claim 1, characterized in that: The side of the mold mechanism (2) is fitted with the inner cavity of the frame frame (3). The top and bottom of the electric hydraulic rod (6) are fixedly connected to the support platform (4) and the base (1) respectively. The top and bottom of the limiting vertical rod (7) are fixedly connected to the base (1). The inner cavity of the base (1) above the inclined block (5) is inclined and fits with the inclined block (5). The inclined slot (8) is located below the inner side of the inclined block (5), and the inclined block (5) and the inclined slot (8) fit together. The two ends of the first spring piece (9) are fixedly connected to the support platform (4) and the inclined block (5) respectively.

4. The core replacement machine for casting molds of bent pipe fittings according to claim 1, characterized in that: The top of the double-sided inclined block (10) passes through the base (1) and the frame (3) and extends into the interior of the frame (3). The bottom of the double-sided inclined block (10) is fixedly connected to the support platform (4). The two ends of the U-shaped frame (11) are inclined on one side of the double-sided inclined block (10) and cooperate with the inclined surface on the double-sided inclined block (10). The end of the limiting column (12) near the upper mold (202) is provided with a rounded chamfer and passes through the side wall of the frame (3) and is engaged with the limiting hole (14). The two ends of the first tension spring (13) are fixedly connected to the U-shaped frame (11) and the frame (3) respectively.

5. The core replacement machine for casting molds of bent pipe fittings according to claim 1, characterized in that: The upper middle part of the outer surface of the block (151) is movably connected to the inner cavity of the upper mold (202). The end of the limiting plate (152) away from the block (151) is fixedly connected to the lower mold (201). The end of the first protrusion (153) away from the first spring (154) passes through the side wall of the limiting plate (152) and is engaged with the inner cavity of the block (151). The end of the first spring (154) away from the first protrusion (153) is fixedly connected to the limiting plate (152). The end of the second protrusion (155) away from the first protrusion (153) passes through the side wall of the block (151) and is engaged with the inner cavity of the lower mold (201). The ends of the first protrusion (153) and the second protrusion (155) that are close to each other are in contact.

6. The core replacement machine for casting molds of bent pipe fittings according to claim 1, characterized in that: One end of the top of the top rod (159) passes through the support platform (4) and the lower mold (201) and extends into the interior of the lower mold (201) and engages with the bottom of the piston column (157). The top of the second spring (158) is fixedly connected to the lower mold (201).

7. The core replacement machine for casting molds of bent pipe fittings according to claim 1, characterized in that: The upper and lower surfaces of the core rod (1510), the third spring (1511), and the arc-shaped plug (1512) respectively cooperate with the upper mold (202) and the lower mold (201). The two ends of the third spring (1511) are fixedly connected to the core rod (1510) and the arc-shaped plug (1512) respectively. The end of the core rod (1510) away from the block (151) contacts the inner wall of the lower mold (201) and the upper mold (202) respectively. The end of the arc-shaped plug (1512) away from the third spring (1511) contacts the upper mold (202) and the lower mold (201) respectively. The upper and lower parts of the Y-shaped pipe (1513) are respectively opened on the upper mold (202) and the lower mold (201). The two ends of the Y-shaped pipe (1513) near the block (151) are respectively connected to the inner cavities on both sides of the lower mold (201) and the upper mold (202).

8. The core replacement machine for casting molds of bent pipe fittings according to claim 2, characterized in that: The top of the stopper rod (161) is pressed against the bottom of the support platform (4), the top and bottom of the second tension spring (162) are fixedly connected to the base (1) and the stopper rod (161) respectively, and one end of the top of the connecting tube (163) is connected to the inner cavity of the outer rod (164).

9. The core replacement machine for casting molds of bent pipe fittings according to claim 2, characterized in that: The inner rod (165) is hinged at one end away from the outer rod (164) to the side of the telescopic rod (166) near the outer rod (164). The bottom and top of the telescopic rod (166) are hinged to the base (1) and the frame (3) respectively. The two ends of the second spring (167) are fixedly connected to the base (1) and the frame (3) respectively.

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