Core shooter convenient for die replacement

Abstract

The invention relates to the technical field of casting processing, in particular to a core shooter convenient for die replacement, which comprises a lower die, an upper die, a first moving module and a base frame, the first moving module is arranged on one side of the base frame, the upper die is detachably mounted on the first moving module, and a template seat is mounted on the base frame through a second moving group; a plurality of vertical holes B are uniformly distributed in the template seat, two vertical holes A are formed in the template seat, and a frame body A and a frame body B are arranged at the bottom of the template seat; two positioning pins are fixed to the frame body A and installed in the corresponding vertical holes A in a telescopic and sliding mode respectively, and two positioning holes A are formed in the bottom of the lower die. Moving-in and moving-out of the mold are completed by matching the movable transfer table with the mold plate base, translation replacement of new and old molds is achieved, a traditional hoisting operation mode is replaced, the shaking and falling risks in the hoisting process are avoided, the safety of mold replacement operation is improved, meanwhile, the mold transfer path is simplified to a two-dimensional plane from a three-dimensional space, and the production efficiency is improved. And the die changing process is stable and controllable.

Description

Technical Field

[0001] This invention relates to the field of casting processing technology, specifically to a core shooter that facilitates mold changing. Background Technology

[0002] The cold core box core shooter is a key piece of equipment used in the foundry industry for sand core preparation. Its core is to inject sand mixed with resin binder into a pre-set core box cavity under high pressure through a sand shooting mechanism at room temperature, and then blow catalytic gas into the cavity to make the sand core solidify and form quickly.

[0003] When changing molds on a cold box core shooting machine, first connect the upper and lower molds to the lifting ropes on the special lifting device, and then remove the fixing bolts and connecting pipelines of the upper and lower molds respectively. Then, use the lifting device to steadily lift the old mold, and then lift the new mold into place and accurately position it. Finally, tighten the fixing bolts to complete the installation.

[0004] When using lifting equipment to lift and change molds, the molds are prone to swaying when suspended in the air. The molds need to be manually adjusted and positioned continuously for installation. This relies on the experience and skill of the staff, making the mold changing process cumbersome and the overall mold changing cycle long. In addition, the molds are heavy and are prone to swaying and falling during the lifting process due to lifting equipment fatigue, insecure mounting, or operational errors, posing multiple safety hazards. Summary of the Invention

[0005] The purpose of this invention is to provide a core shooting machine that facilitates mold changing, thereby solving the technical problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution.

[0007] A core shooting machine with convenient mold changing includes a lower mold, an upper mold, a first movable module, and a base frame. The first movable module is located on one side of the base frame. The upper mold is detachably mounted on the first movable module. A mold plate seat is mounted on the base frame via a second movable module. The mold plate seat has several vertical holes B evenly distributed on it, and two vertical holes A are provided on the mold plate seat. The bottom of the mold plate seat has a frame body A and a frame body B. Two positioning pins are fixed on the frame body A, and the two positioning pins are slidably installed in the corresponding vertical holes A. The bottom of the lower mold has two positioning pins. Position hole A: The lower mold is positioned on the mold plate seat by being inserted into positioning hole A through positioning pin; Frame B is equipped with several rollers, each corresponding to a vertical hole B; A linkage mechanism is located below the mold plate seat, which is used to move frames A and B in opposite directions in the vertical direction; A traction mechanism is located at the bottom of the base frame, used to pull frame A downward; An L-shaped positioning piece is located above the mold plate seat for positioning the lower mold; The core shooting machine is also equipped with a moving transfer platform, which has placement area A and placement area B.

[0008] Preferably, the first moving module is used to drive the upper mold to lift and adjust, and the second moving group is used to drive the template seat to lift and adjust left and right. The second moving group includes hydraulic cylinder A, hydraulic cylinder B, and a frame seat. Two slide rods extending along the length of the base frame are symmetrically installed on the base frame, and two slide seats are slidably fitted on each slide rod. The frame seat is fixed between the four slide seats, and two guide rods A are symmetrically slidably installed through the frame seat. The template seat is fixed on the top of the two guide rods A. A mounting seat is fixed on one side of the top of the base frame, and hydraulic cylinder A is fixed on the mounting seat and extends along the length of the base frame. The telescopic rod of hydraulic cylinder A is fixedly connected to the side of the frame seat. Hydraulic cylinder B is fixed below the frame seat, and its telescopic rod passes through the frame seat and is fixedly connected to the lower surface of the template seat.

[0009] Preferably, the lower mold has positioning holes B evenly distributed on its top end face; the upper mold has pins evenly distributed on its bottom end face; when the lower mold and the upper mold are closed, the pins are inserted into the positioning holes B one by one.

[0010] Preferably, frame A includes a frame plate; a sliding groove is provided on one side of the template seat, and a lifting seat is vertically and slidably installed in the sliding groove; the frame plate is fixed to the side of the lifting seat and extends along the length of the base frame; two positioning pins are respectively vertically fixed above the frame plate; frame B includes a U-shaped frame and a connecting frame; the U-shaped frame is set below the template seat, and the connecting frame is fixed on the U-shaped frame; protruding columns are matched and fixed at the positions corresponding to each vertical hole B on the top of the U-shaped frame, and rolling balls are correspondingly embedded in the top of the protruding columns.

[0011] Preferably, three guide rods B are fixed at intervals along the width direction of the base frame on the lower surface of the template seat; wherein, the middle guide rod B is shorter than the other two guide rods B; the frame plate is slidably fitted on the middle guide rod B, and the U-shaped frame is slidably fitted on the other two guide rods B.

[0012] Preferably, the linkage mechanism includes a reversing traction gear, rack A, and rack B; the bottom ends of both guide rods B are fixed with bearing seats, and a shaft is rotatably mounted on both bearing seats; the reversing traction gear is fixedly mounted on the shaft; rack A is vertically fixed below the frame plate, and rack B is vertically fixed below the connecting frame; rack A meshes with the reversing traction gear from one side, and rack B meshes with the reversing traction gear from the other side.

[0013] Preferably, the traction mechanism includes a hydraulic cylinder C and a traction plate; the hydraulic cylinder C is vertically fixed to the bottom of the base frame and to the side away from the first moving module; the traction plate is fixed to the telescopic end of the hydraulic cylinder C and extends along the width direction of the base frame; a vertically downward extending vertical plate is fixed to the lower surface of the frame plate, and a U-shaped traction member that cooperates with the traction plate is fixed to the bottom end of the vertical plate; the opening on the U-shaped traction member is used to accommodate the telescopic rod of the hydraulic cylinder C.

[0014] Preferably, one side of the L-shaped positioning component is parallel to the length direction of the base frame, and the other side is parallel to the width direction of the base frame; when the L-shaped positioning component is fitted tightly to the corner corresponding to the lower mold, the positions of the positioning pin and the positioning hole A correspond one-to-one.

[0015] Preferably, the mobile transfer platform has insertion holes on all four sides of the placement area A and the placement area B, and each insertion hole is equipped with a stop pin.

[0016] The mold changing method for this core shooting machine is as follows: The upper and lower molds to be replaced are pre-assembled to form a replacement mold body, and placed on the placement area A. The mobile transfer platform is moved to the side of the base frame to ensure that the placement area B corresponds to the position of the mold plate seat. The drive plate base moves until the lower mold to be replaced is directly below the upper mold to be replaced, and the upper mold to be replaced and the lower mold are joined to form the original mold body. Then the upper mold to be replaced is removed from the first moving module. The drive plate base moves to the position corresponding to the placement area B, and the traction mechanism pulls the frame A downward, causing the positioning pin to retract into the vertical hole A; The original mold assembly is moved to the placement area B, and then the moving transfer platform is moved along the length of the base frame until the placement area A corresponds to the position of the mold plate seat. The replacement mold assembly is then moved to the mold plate seat and positioned. Subsequently, the mold plate seat is driven to move to the bottom of the first moving module, and the replaced upper mold is reinstalled on the first moving module.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention uses a mobile transfer platform in conjunction with a mold plate base to move the mold in and out, realizing the translational replacement of old and new molds. It replaces the traditional hoisting operation mode, avoids the risks of shaking and falling during hoisting, improves the safety of mold changing operation, and simplifies the mold transfer path from three-dimensional space to two-dimensional plane, making the mold changing process stable and controllable.

[0018] 2. When the lower mold is placed on the mold plate seat, the present invention only needs to align its corner with the L-shaped positioning piece to automatically achieve precise alignment between the positioning pin and the positioning hole A. This mechanical positioning method eliminates the tedious steps of manually adjusting the mold position repeatedly to align with the installation reference in the traditional method, realizing rapid and accurate positioning of the lower mold and improving mold changing efficiency.

[0019] 3. This invention uses a linkage mechanism to reverse the movement of the positioning pin and the rolling ball, and utilizes the single power input of the traction mechanism and the gravity of the mold itself to synchronously realize the extension and retraction of the positioning pin and the lifting or falling of the rolling ball. This design replaces the two independent drive systems that control the lifting and lowering of the positioning pin and the rolling ball with a single power source and linkage mechanism, which simplifies the equipment structure and control system, reduces manufacturing costs and failure points, and ensures strict synchronization and stroke matching of the two key actions of the positioning pin disengaging from the positioning and the rolling ball lifting the mold. Attached Figure Description

[0020] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the upper and lower molds being joined together. Figure 3 for Figure 1 A partial structural diagram of the structure shown; Figure 4 This is a schematic diagram of the second moving group structure in the present invention; Figure 5 This is a partial structural diagram of the top of the mold plate holder in this invention; Figure 6 for Figure 5 A partial structural diagram of the structure shown; Figure 7 for Figure 6 One of the schematic diagrams of the cross-section of the structure shown; Figure 8 for Figure 6 The second schematic diagram of the cross-section of the structure shown; Figure 9 This is a schematic diagram of the linkage mechanism structure in this invention; Figure 10 This is a schematic diagram showing the structural cooperation between the traction mechanism and the U-shaped traction component in this invention; Figure 11 This is a schematic diagram of the mobile transfer platform structure in this invention; Figure 12 This is a schematic diagram of the core shooting machine during mold changing; Figure 13 This is a schematic diagram of the mold changing process of this core shooting machine.

[0021] In the diagram: 01, lower mold; 011, positioning hole A; 012, positioning hole B; 02, upper mold; 021, pin; 03, original mold body; 04, replacement mold body; 05, first moving module; 1, base frame; 2, second moving group; 21, hydraulic cylinder A; 211, mounting base; 22, hydraulic cylinder B; 23, frame base; 231, guide rod A; 24, slide rod; 25, slide block; 3, template base; 301, L-shaped positioning component; 31, vertical hole A; 32, vertical hole B; 33, slide groove; 34. Guide rod B; 4. Positioning pin; 41. Frame plate; 42. Lifting seat; 5. Ball bearing; 51. U-shaped frame; 52. Protruding column; 53. Connecting frame; 6. Linkage mechanism; 61. Reversing traction gear; 611. Bearing seat; 612. Shaft; 62. Rack A; 63. Rack B; 7. Traction mechanism; 71. Hydraulic cylinder C; 72. Traction plate; 8. Vertical plate; 81. U-shaped traction component; 9. Mobile transfer platform; 91. Placement area A; 92. Placement area B; 93. Insertion hole; 94. Stop pin. Detailed Implementation

[0022] The embodiments of the present invention will now be described with reference to the accompanying drawings.

[0023] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection" and "installation" should be interpreted broadly, wherein "fixed" means that the devices or elements are connected to each other and their relative positional relationship remains unchanged after connection. The directional terms mentioned in the embodiments of the present invention are only for reference to the directions in the accompanying drawings, and are intended to better and more clearly illustrate and understand the embodiments of the present invention. They are not intended to indicate or imply that the devices or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limitations on the embodiments of the present invention. Example 1

[0024] Please see Figures 1-13 This invention provides a core shooting machine for convenient mold changing, including a lower mold 01, an upper mold 02, a first moving module 05, a base frame 1, a sand shooting mechanism (not shown in the figure), and an air blowing mechanism (not shown in the figure). The first moving module 05 is disposed on one side of the base frame 1. The sand shooting mechanism and the air blowing mechanism are integrated and disposed on the side of the first moving module 05. The upper mold 02 is detachably mounted on the first moving module 05. The first moving module 05 is used to drive the upper mold 02 to adjust its height. A mold plate holder 3 is mounted on the base frame 1 through a second moving group 2. The second moving group 2 is used to drive the mold plate holder 3 to adjust its left and right and height. The length direction of the base frame 1 is the left and right direction. The side of the base frame 1 away from the first moving module 05 in its length direction is defined as the mold changing station, and the other side is the core shooting station. There is a material unloading station between the mold changing station and the core shooting station.

[0025] like Figure 5 , Figure 6 and Figure 7 As shown, the template base 3 has two vertical holes A31. The bottom of the template base 3 has a frame A. Two positioning pins 4 are fixed on the frame A. The two positioning pins 4 are telescopically slidably installed in the corresponding vertical holes A31. The bottom of the lower mold 01 has two positioning holes A011. The lower mold 01 is positioned on the template base 3 by matching and inserting the positioning pins 4 into the positioning holes A011.

[0026] like Figure 2 As shown, the lower mold 01 has positioning holes B012 at the four corners of its top end face, and the upper mold 02 has pins 021 evenly distributed on its bottom end face. The number and position of the pins 021 correspond one-to-one with the number and position of the positioning holes B012. When the lower mold 01 and the upper mold 02 are closed, the pins 021 are inserted into the positioning holes B012 one-to-one.

[0027] The working principle of this core shooting machine is as follows: The lower mold 01 is positioned on the mold plate holder 3. The second moving group 2 drives the mold plate holder 3 to move to the core shooting station. At this time, the lower mold 01 is directly below the upper mold 02. Then, the second moving group 2 drives the mold plate holder 3 and the lower mold 01 to move upward until the lower mold 01 and the upper mold 02 are closed. Subsequently, the first moving module 05 and the second moving group 2 work simultaneously, driving the lower mold 01 and the upper mold 02 to move upward synchronously while maintaining the mold closed state until the top of the upper mold 02 is pressed against the sand injection mechanism. The sand injection mechanism injects sand into the cavity. Then, the blowing mechanism is switched to press against the top of the upper mold 02 (the specific switching mechanism is prior art and will not be described in detail in this application). The blowing mechanism blows catalytic gas into the cavity, so that the sand core can be quickly solidified and formed. After the sand core is formed, the first moving module 05 and the second moving group 2 work simultaneously, driving the lower mold 01 and the upper mold 02 to move down synchronously until the upper mold 02 returns to its initial position. Then, the second moving group 2 drives the lower mold 01 to continue moving down to the bottom. At this time, the lower mold 01 and the upper mold 02 separate, and the formed sand core is exposed. Subsequently, the second moving group 2 drives the mold plate base 3, the lower mold 01 and the formed sand core to move to the unloading station. The formed sand core is unloaded and transferred by the worker or the robotic arm, thus completing one processing step of the sand core. By repeating the above steps, sand core making production can be carried out continuously.

[0028] It is worth noting that by using the positioning pins 4 to be inserted one-to-one into the positioning holes A011 at the bottom of the lower mold 01, and the pins 021 to be inserted one-to-one into the positioning holes B012 when the lower mold 01 and the upper mold 02 are closed, the lower mold 01 and the upper mold 02 can be limited in the horizontal direction, preventing the lower mold 01 and the upper mold 02 from shifting back and forth or left and right at will. On the one hand, it can prevent the mechanical vibration generated by the operation of the second moving group 2 and the first moving module 05 from causing the lower mold 01 and the upper mold 02 to shift out of position, ensuring that the injection port and the air blowing port at the top of the upper mold 02 can be aligned with the sand injection mechanism and the air blowing mechanism, respectively. On the other hand, it can prevent the upper mold 02 from being squeezed by the sand injection mechanism and the air blowing mechanism, which would cause the lower mold 01 and the upper mold 02 to shift out of position.

[0029] In addition, the first moving module 05, the sand-shooting mechanism and the air-blowing mechanism in this application all adopt existing technologies, and their specific structures and working principles will not be described in detail.

[0030] like Figure 5 , Figure 6 and Figure 8 As shown, the mold plate base 3 has several vertical holes B32 evenly distributed on it, and a frame B is provided below the mold plate base 3. The frame B has several rolling balls 5, and each rolling ball 5 corresponds to a vertical hole B32. In addition, a linkage mechanism 6 is provided below the mold plate base 3. The linkage mechanism 6 is used to link the frame A and the frame B to move in opposite directions in the vertical direction (when the frame A moves upward, the linkage mechanism 6 can drive the frame B to move downward; when the frame B moves upward, the linkage mechanism 6 can drive the frame A to move upward. In short, the linkage mechanism 6 is used for transmission between the frame A and the frame B, so that the two frames always move in opposite directions in a linkage manner). The bottom of the base frame 1 is provided with a traction mechanism 7, which is used to pull the frame A downward. An L-shaped positioning part 301 for positioning the lower mold 01 is provided above the mold plate base 3. The core shooting machine is also equipped with a moving transfer table 9, which has a placement area A91 and a placement area B92.

[0031] This core shooting machine is equipped with various models of lower mold 01 and upper mold 02. Different models of molds are used to produce products of the same series (different sizes and shapes) or different series. The only difference between different models of molds is the shape and size of the cavity, while the outer shape and external dimensions are the same. Therefore, different models of molds are all compatible with the structure of this core shooting machine.

[0032] The specific mold-changing method for this core-shooting machine is as follows: Before the previous batch of sand core production is nearing completion, the lower mold to be replaced is placed in placement area A91, as follows: Figure 12 As shown, the upper mold to be replaced is then placed on the lower mold to form a replacement mold body 04, and the movable transfer platform 9 is moved to the side of the base frame 1, ensuring that the position of the placement area B92 (unloaded state) corresponds to the mold changing station; After all the sand cores in the previous batch are produced, the working drive plate base 3 of the second moving group 2 moves to the core shooting station. At this time, the lower mold to be replaced is located directly below the upper mold to be replaced. Then, the upper mold to be replaced is driven by the first moving module 05 to press onto the lower mold to be replaced. The two molds are closed to form the original mold body 03. Then, the upper mold to be replaced is removed from the first moving module 05, and the working drive plate base 3 of the second moving group 2 and the original mold body 03 are moved as a whole to the mold changing station. At this time, the placement area B92 corresponds to the position of the original mold body 03 (e.g., Figure 12 (as shown) The traction mechanism 7 pulls the frame body A and the two positioning pins 4 downwards simultaneously. The two positioning pins 4 downwards are respectively dislodged from the positioning hole A011 and retracted into the vertical hole A31, so that the original mold body 03 has the ability to move in the horizontal direction. like Figure 12 and Figure 13 As shown, the original mold assembly 03 is aligned and pushed onto the placement area B92 along the width direction of the base frame 1. Then, the moving transfer platform 9 is moved along the length direction of the base frame 1 until the replacement mold assembly 04 corresponds to the position of the mold plate seat 3. The replacement mold assembly 04 is then pushed onto the mold plate seat 3 along the width direction of the base frame 1. With the auxiliary positioning of the L-shaped positioning piece 301, the two positioning holes A011 below the replaced lower mold are aligned with the two positioning pins 4. The traction mechanism 7 cancels the pull on the frame A, and the two positioning pins 4 move upward and are aligned and inserted into the positioning holes A011 to achieve positioning. Subsequently, the second moving group 2 drives the mold plate base 3 to move to the core shooting station, and then the second moving group 2 drives the replacement mold body 04 to move upward until the replaced upper mold reaches the installation position. Then, the replaced upper mold is reinstalled on the first moving module 05, thus realizing the replacement of the upper and lower molds. The replaced mold is then transferred to the mold storage area by the moving transfer table 9.

[0033] When changing molds using the above method, compared to the traditional method of using lifting equipment, the total time for changing a set of molds is reduced from eight minutes to four minutes. The mold changing mechanism of this core shooting machine does not rely on lifting or traction equipment. It can not only transfer and change the upper and lower molds at the same time, but also quickly position the lower mold, thus improving the efficiency and safety of the mold changing operation.

[0034] It is worth noting that when the traction mechanism 7 pulls the frame A and the positioning pin 4 downwards, under the transmission action of the linkage mechanism 6, the drive frame B and each ball 5 move upwards synchronously. The balls 5 are pushed out from the vertical hole B32 one by one, which can support and raise the original mold body 03. On the one hand, the sliding friction between the original mold body 03 and the upper surface of the mold plate seat 3 is converted into rolling friction, reducing the pushing resistance and making the process of pushing the original mold body 03 to move smoother, easier and more precise, reducing the difficulty of operation. On the other hand, it can avoid excessive wear on the contact surface between the lower mold and the mold plate seat 3 (excessive wear will cause the top surface of the mold plate seat 3 to become uneven, which will not only destroy the placement benchmark of the lower mold, causing the lower mold to be unable to fit smoothly and making it easy to deviate when closing the mold, but also cause uneven force on the lower mold. During the production process, the vibration of the equipment will aggravate the wear of the mold and even cause the mold to deform), thus extending the service life of the components.

[0035] One side of the L-shaped positioning piece 301 is parallel to the length direction of the base frame 1, and the other side is parallel to the width direction of the base frame 1. When the corner of the lower mold is fitted and close to the L-shaped positioning piece 301 (that is, both sides of the L-shaped positioning piece 301 are in contact with the lower mold), the positions of the two positioning pins 4 and the two positioning holes A011 correspond one-to-one.

[0036] When the traction mechanism 7 releases the pull on frame A, under the gravity of the mold, frame B and each ball 5 are pushed down synchronously. At this time, each ball 5 moves down and retracts into the vertical hole B32. The replacement lower mold is smoothly attached to the top surface of the mold plate seat 3. At the same time, when frame B moves down, under the linkage of linkage mechanism 6, frame A and two positioning pins 4 are driven up synchronously. The two positioning pins 4 extend upward and can automatically insert into the corresponding positioning hole A011 to achieve positioning of the lower mold. This simplifies the mold changing operation steps, avoids the errors and tediousness of manual alignment, and ensures the accuracy and stability of the lower mold positioning, thus ensuring the precision of subsequent mold closing and sand shooting core making. Example 2

[0037] Please see Figure 3 and Figure 4 Based on Example 1, this example provides a detailed explanation of the second moving group 2, as follows: The second moving group 2 includes hydraulic cylinder A21, hydraulic cylinder B22, and frame seat 23. Slide rods 24 are fixedly installed on the two long sides of the base frame 1. The two slide rods 24 are symmetrically arranged and extend along the length of the base frame 1. Two slide seats 25 are slidably fitted on each slide rod 24. The frame seat 23 is fixed between the four slide seats 25. By utilizing the sliding cooperation between the slide rods 24 and the slide seats 25, the frame seat 23 has the ability to slide and adjust along the length of the base frame 1. Two guide rods A231 are symmetrically slidably installed through the frame seat 23. The mold plate seat 3 is fixed on the top of the two guide rods A231, so that the mold plate seat 3 has the ability to move up and down.

[0038] A mounting base 211 is fixed on one side of the top of the base frame 1. Hydraulic cylinder A21 is fixed on the mounting base 211 and extends along the length of the base frame 1. The telescopic rod of hydraulic cylinder A21 is fixedly connected to the side of the frame seat 23. Hydraulic cylinder B22 is fixed below the frame seat 23. Its telescopic rod passes through the frame seat 23 and is fixedly connected to the lower surface of the mold plate seat 3. When hydraulic cylinder A21 extends and retracts, its telescopic rod can drive the frame seat 23 and the mold plate seat 3 to move left and right. When hydraulic cylinder A21 extends to its limit, the mold plate seat 3 moves to the mold changing station. When hydraulic cylinder A21 retracts to its limit, the mold plate seat 3 moves to the core shooting station. When hydraulic cylinder B22 extends and retracts, its telescopic rod can drive the mold plate seat 3 to perform corresponding lifting and lowering adjustments.

[0039] In addition, when the positioning pin 4 moves to its limit position, the lifting seat 42 moves upward simultaneously and extends above the mold plate seat 3. During mold changing, the extension and retraction of the positioning pin 4 can be judged according to the height of the top of the lifting seat 42 relative to the top surface of the mold plate seat 3. This prevents situations where the positioning pin 4 pushes the original mold closing body 03 to move before it retracts or moves and replaces the mold closing body 04 before it extends to replace the mold closing body 04 for positioning. This has a foolproof effect. Example 3

[0040] Please see Figures 6-9 Based on Example 2, this example provides a detailed explanation of frame A and frame B, as follows: Frame A includes a frame plate 41. A groove 33 is provided on one side of the template base 3. A lifting seat 42 is vertically and slidably installed in the groove 33. The frame plate 41 is fixed to the side of the lifting seat 42 and extends along the length of the base frame 1. Two positioning pins 4 are vertically fixed above the frame plate 41. Frame B includes a U-shaped frame 51 and a connecting frame 53. The U-shaped frame 51 is located below the template base 3. The connecting frame 53 is fixed on the U-shaped frame 51. A protruding post 52 is fixed at the top of the U-shaped frame 51 at the position corresponding to each vertical hole B32. Rolling balls 5 are embedded in the top of the protruding post 52 one by one.

[0041] In addition, three guide rods B34 are fixed at intervals along the width direction of the base frame 1 on the lower surface of the mold plate base 3. Among them, the middle guide rod B34 is shorter than the other two guide rods B34. The frame plate 41 is slidably fitted on the middle guide rod B34, and the U-shaped frame 51 is slidably fitted on the other two guide rods B34. Through the sliding cooperation between the lifting seat 42 and the slide groove 33 and the sliding cooperation between the frame plate 41 and the middle guide rod B34, the frame A has the ability to move up and down. Through the sliding cooperation between the U-shaped frame 51 and the two side guide rods B34, the frame B has the ability to move up and down.

[0042] When the positioning pin 4 moves upward to its limit position and is inserted into the positioning hole A011 to position the lower mold, the upper surface of the support plate 41 is in contact with the lower surface of the mold plate seat 3, and the ball 5 retracts into the vertical hole B32, with all parts extending above the mold plate seat 3. The blocking action of the support plate 41 and the lower surface of the mold plate seat 3 not only provides a positioning limit for the upward movement of the positioning pin 4 and the downward movement of the ball 5, but also increases the structural strength and ensures that the positioning pin 4 is more stable when the support plate 41 is in contact with the lower surface of the mold plate seat 3. When the ball 5 moves upward to its limit position and pushes the lower mold up, the U-shaped frame 51 is in contact with the lower surface of the mold plate seat 3, and the positioning pin 4 is completely retracted into the vertical hole A31. Example 4

[0043] Please see Figure 3 , Figure 9 and Figure 10 Based on Example 3, this example provides a detailed explanation of the linkage mechanism 6 and the traction mechanism 7, as follows: The traction mechanism 7 includes a hydraulic cylinder C71 and a traction plate 72. The hydraulic cylinder C71 is vertically fixed to the bottom of the base frame 1 and to the side away from the first moving module 05. The traction plate 72 is fixed to the telescopic end of the hydraulic cylinder C71 and extends along the width direction of the base frame 1. A vertically downward extending vertical plate 8 is fixed to the lower surface of the frame plate 41. A U-shaped traction member 81 that cooperates with the traction plate 72 is fixed to the bottom end of the vertical plate 8. The opening on the U-shaped traction member 81 is used to accommodate the telescopic rod of the hydraulic cylinder C71. When the second moving group 2 drives the mold plate seat 3 to move to the mold changing station, the hydraulic cylinder C71 and the U-shaped traction member 81 are in the same position.

[0044] The linkage mechanism 6 includes a reversing traction gear 61, rack A62 and rack B63. The bottom ends of the guide rods B34 on both sides are fixed with bearing seats 611. The shaft 612 is rotatably mounted on the two bearing seats 611. The reversing traction gear 61 is fixedly mounted on the shaft 612. The rack A62 is vertically fixed below the frame plate 41, and the rack B63 is vertically fixed below the connecting frame 53. The rack A62 meshes with the reversing traction gear 61 from one side, and the rack B63 meshes with the reversing traction gear 61 from the other side.

[0045] Before the second moving group 2 drives the mold plate base 3 and the original mold clamping body 03 to move to the mold changing station, the hydraulic cylinder C71 extends to drive the traction plate 72 upward to its limit position. When the mold plate base 3 and the original mold clamping body 03 reach the mold changing station (at this time, the mold plate base 3 and the original mold clamping body 03 are in the downward position at the lowest point), the telescopic rod of the hydraulic cylinder C71 enters the opening of the U-shaped traction member 81, and the traction plate 72 is located above the U-shaped traction member 81. Subsequently, the hydraulic cylinder C71 retracts to drive the traction plate 72 downward. Under the blocking action of 1 and the connecting action of the vertical plate 8, the frame plate 41 and the positioning pin 4 are pulled down. The rack A62 moves down synchronously with the frame plate 41. The downward rack A62 meshes with the reversing traction gear 61 to rotate. The rotating reversing traction gear 61 meshes with the rack B63, the connecting frame 53, the U-shaped frame 51, the protruding column 52 and the ball 5 to move up as a whole. The downward positioning pin 4 is dislodged from the positioning hole A011 and retracts into the vertical hole A31, canceling the positioning of the lower mold and ensuring that the lower mold can move horizontally. The upward ball 5 pushes and lifts the lower mold, making it easier to move the lower mold.

[0046] When the original mold assembly 03 is replaced and the replacement mold assembly 04 is moved above the mold plate seat 3, the hydraulic cylinder C71 slowly extends when the positioning pin 4 is aligned with the positioning hole A011. Under the blocking action of the traction plate 72 and the U-shaped traction component 81, as well as the connecting action of the vertical plate 8, the frame plate 41 can be slowly released. Under the action of the lower mold's gravity, the roller ball 5, the protrusion 52, the U-shaped frame 51, the connecting frame 53, and the rack B63 move downward as a whole. The downward rack B63 meshes with the reversing traction gear 61 to rotate. The rotating reversing traction gear 61 meshes with the rack A62, the frame plate 41, and the positioning pin 4 to move upward as a whole. Finally, the positioning pin 4 moves upward to the limit position and is inserted into the positioning hole A011 of the lower mold to position the mold. Meanwhile, the roller ball 5 moves downward to reset into the protrusion 52, ensuring that the bottom surface of the lower mold is stably attached to the top surface of the mold plate seat 3.

[0047] Two bearing seats 611 are respectively installed at the bottom of the two guide rods B34. The two bearing seats 611 are fixedly installed under the mold plate seat 3 by the two guide rods B34. The two guide rods B34 not only serve as sliding guides for the U-shaped frame 51, but also as auxiliary installation parts for the reversing traction gear 61. This integrated design reduces the number of independent parts, lowers manufacturing costs, and makes the component layout clearer during subsequent maintenance.

[0048] By setting up a linkage mechanism 6, the lifting and lowering of the positioning pin 4 and the ball 5 are linked together. There is no need to set up two separate drive sources. The extension and retraction of the positioning pin 4 and the lifting or retraction of the ball 5 can be completed by means of the pulling power of the traction mechanism 7 or the gravity of the mold itself. This simplifies the equipment structure and reduces power consumption and control complexity. The high meshing transmission of the gear and rack can strictly ensure the matching of the movement stroke of the frame A and the frame B, ensuring that the positioning pin 4 is accurately disengaged or accurately inserted and the ball 5 is smoothly lifted or lowered during mold changing. This avoids the mold pushing jamming and positioning inaccuracy caused by movement deviation. At the same time, this linkage mechanism allows the positioning unlocking and locking actions in the mold changing process to be seamlessly connected without manual intervention and coordination. This improves the efficiency of mold changing and ensures the stability of operation. Example 5

[0049] Please see Figure 11 Based on the foregoing embodiments, this embodiment provides a detailed explanation of the mobile transfer platform 9, as follows: The support legs of the mobile transfer platform 9 are equipped with casters with brakes to facilitate overall movement. The placement areas A91 and B92 are each equipped with ball bearings, and the height of the ball bearings is basically the same as the height of the ball bearing 5 when it reaches its limit position, which facilitates the movement of the original mold body 03 and the replacement mold body 04 between the mobile transfer platform 9 and the mold plate base 3.

[0050] In addition, the mobile transfer platform 9 is provided with insertion holes 93 on all four sides of the placement area A91 and the placement area B92. Each insertion hole 93 is equipped with a stop pin 94. The stop pin 94 can limit the original mold body 03 and the replacement mold body 04 respectively, preventing the mold from shifting and falling off at will. When the mold is transferred, the stop pin 94 on the corresponding side can be pulled out from the insertion hole 93.

[0051] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention.

Claims

1. A core shooter with convenient mold changing, comprising a lower mold (01), an upper mold (02), a first moving mold group (05) and a base frame (1), the first moving mold group (05) is arranged on one side of the base frame (1), the upper mold (02) is detachably mounted on the first moving mold group (05), a mold plate seat (3) is mounted on the base frame (1) through a second moving group (2), characterized in that: a pair of vertical holes A (31) and a plurality of vertical holes B (32) are formed in the mold plate seat (3), and the mold plate seat (3) is provided with a frame body A and a frame body B at the bottom; two positioning pins (4) are fixed on the frame body A, and the two positioning pins (4) are respectively and telescopically slidably installed in the corresponding vertical holes A (31), the lower mold (01) is provided with two positioning holes A (011) at the bottom, and the lower mold (01) is positioned and placed on the mold plate seat (3) by matching and inserting the positioning pins (4) into the positioning holes A (011); a plurality of rolling balls (5) are arranged on the frame body B, and each rolling ball (5) corresponds to a vertical hole B (32) in position; a linkage mechanism (6) is arranged below the mold plate seat (3) and is used for linkage of the frame body A and the frame body B in the vertical direction and reverse movement; a traction mechanism (7) is arranged at the bottom of the base frame (1) and is used for pulling the frame body A downward; an L-shaped positioning piece (301) is arranged above the mold plate seat (3); the core shooter is further provided with a moving transfer table (9) having a placing area A (91) and a placing area B (92) at the top.

2. The core shooter with convenient mold changing according to claim 1, characterized in that: the first moving mold group (05) is used for driving the upper mold (02) to adjust the lifting, and the second moving group (2) is used for driving the mold plate seat (3) to adjust the lifting and left-right movement; the second moving group (2) comprises a hydraulic cylinder A (21), a hydraulic cylinder B (22) and a frame seat (23); two slide rods (24) extending along the length direction of the base frame (1) are symmetrically mounted on the base frame (1), and two slide seats (25) are slidably sleeved on each slide rod (24); the frame seat (23) is fixed between the four slide seats (25), two guide rods A (231) are symmetrically and slidably penetrated and mounted on the frame seat (23), and the mold plate seat (3) is fixed on the top ends of the two guide rods A (231); an installation seat (211) is fixed on one side of the top of the base frame (1), the hydraulic cylinder A (21) is fixed on the installation seat (211) and extends along the length direction of the base frame (1), and the telescopic rod of the hydraulic cylinder A (21) is fixedly connected with the side of the frame seat (23); the hydraulic cylinder B (22) is fixed below the frame seat (23), the telescopic rod of the hydraulic cylinder B (22) penetrates through the frame seat (23) and is fixedly connected with the lower surface of the mold plate seat (3).

3. The core shooter with convenient mold changing according to claim 2, characterized in that: the lower mold (01) is uniformly provided with positioning holes B (012) at the top end surface; the upper mold (02) is uniformly provided with a plug (021) at the bottom end surface; when the lower mold (01) and the upper mold (02) are closed, the plug (021) is inserted into the positioning hole B (012) one by one. ​ 4. A core shooter for easy mold changing according to claim 1, characterized in that: Frame A includes frame panels (41); The template base (3) is provided with a slide groove (33) on one side, and a lifting seat (42) is vertically limited and slidably installed in the slide groove (33). The frame plate (41) is fixed to the side of the lifting seat (42) and extends along the length of the base frame (1); The two positioning pins (4) are respectively fixed vertically above the frame plate (41); The frame B includes a U-shaped frame (51) and a connecting frame (53); The U-shaped frame (51) is located below the template base (3), and a connecting frame (53) is fixed on the U-shaped frame (51). The U-shaped frame (51) is fitted with a protruding post (52) at the position corresponding to each vertical hole B (32), and the rolling ball (5) is embedded in the top of the protruding post (52) one by one.

5. A core shooter for easy mold changing according to claim 4, characterized in that: Three guide rods B (34) are fixed at intervals along the width direction of the base frame (1) on the lower surface of the template base (3). Among them, the middle guide rod B (34) is shorter than the other two guide rods B (34). The frame plate (41) is slidably mounted on the middle guide rod B (34), and the U-shaped frame (51) is slidably mounted on the other two guide rods B (34).

6. A core shooter for easy mold changing according to claim 5, characterized in that: The linkage mechanism (6) includes a reversing traction gear (61), rack A (62) and rack B (63). The bottom ends of the guide rods B (34) on both sides are fixed with bearing seats (611), and the shaft (612) is rotatably mounted on both bearing seats (611). The reversing traction gear (61) is fixedly mounted on the shaft (612); The rack A (62) is vertically fixed below the frame plate (41), and the rack B (63) is vertically fixed below the connecting frame (53); The rack A (62) meshes with the reversing traction gear (61) from one side, and the rack B (63) meshes with the reversing traction gear (61) from the other side.

7. A core shooter for easy mold changing according to claim 6, characterized in that: The traction mechanism (7) includes a hydraulic cylinder C (71) and a traction plate (72); The hydraulic cylinder C (71) is vertically fixed to the bottom of the base frame (1) and to the side away from the first moving module (05); The traction plate (72) is fixed on the telescopic end of the hydraulic cylinder C (71) and extends along the width direction of the base frame (1); The lower surface of the frame plate (41) is fixed with a vertically downward extending vertical plate (8), and the bottom end of the vertical plate (8) is fixed with a U-shaped traction member (81) that cooperates with the traction plate (72). The opening on the U-shaped traction member (81) is used to accommodate the telescopic rod of the hydraulic cylinder C (71).

8. A core shooter for easy mold changing according to claim 1, characterized in that: One side of the L-shaped positioning member (301) is parallel to the length direction of the base frame (1), and the other side is parallel to the width direction of the base frame (1); When the corner of the lower mold (01) fits tightly against the L-shaped positioning piece (301), the positioning pin (4) and the positioning hole A (011) are in a one-to-one correspondence.

9. A core shooter for easy mold changing according to claim 1, characterized in that: The mobile transfer platform (9) is provided with insertion holes (93) on all four sides of the placement area A (91) and the placement area B (92), and each insertion hole (93) is provided with a stop pin (94).

10. A core shooter with convenient mold changing according to claim 1, characterized in that: The mold changing method for a core shooter is as follows: The upper and lower molds to be replaced are pre-assembled to form a replacement mold body (04), and placed on the placement area A (91). The moving transfer platform (9) is moved to the side of the base frame (1) to ensure that the placement area B (92) corresponds to the mold plate seat (3). The drive plate base (3) moves until the lower mold to be replaced is directly below the upper mold to be replaced, and the upper mold to be replaced and the lower mold are joined to form the original mold body (03), and then the upper mold to be replaced is removed from the first moving module (05). The drive plate base (3) moves to the position corresponding to the placement area B (92), and pulls the frame A down through the traction mechanism (7), causing the positioning pin (4) to retract into the vertical hole A (31); The original mold assembly (03) is pushed onto the placement area B (92), and the moving transfer platform (9) is moved along the length of the base frame (1) until the placement area A (91) corresponds to the position of the mold plate seat (3). The replacement mold assembly (04) is then pushed onto the mold plate seat (3) and positioned. Subsequently, the mold plate seat (3) is driven to move to the bottom of the first moving module (05), and the replaced upper mold is reinstalled on the first moving module (05).

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