A mold for easy replacement of hydraulic cylinder piston structure

Abstract

This application relates to a mold for facilitating the replacement of a hydraulic cylinder piston structure. The mold includes a mold base with a molding cavity inside. A core-pulling block for core pulling is slidably connected to the mold base. A mounting seat is provided on the mold base, and a hydraulic cylinder for moving the core-pulling block is mounted on the mounting seat. A mounting sleeve is provided on the outer surface of the hydraulic cylinder, fitting around the outer periphery of the mounting seat. An insertion block is provided on the inner sidewall of the mounting sleeve, and an insertion groove is provided on the mounting seat for insertion and mating with the insertion block. This application improves the efficiency of replacing the hydraulic cylinder piston structure.

Description

Technical Field

[0001] This application relates to the field of mold technology, and in particular to a mold that facilitates the replacement of the hydraulic cylinder piston structure. Background Technology

[0002] In actual production, for products with complex structures such as side holes and bosses, the forming parts have protrusions or holes that are not in the same direction as the mold opening and closing. Such molds usually need to be equipped with a side core-pulling mechanism. Specifically, a hydraulic cylinder and a core-pulling block are installed on the mold at the position corresponding to the complex structure of the product. The hydraulic cylinder drives the core-pulling block to perform core-pulling or resetting actions, so that the core-pulling block is detached from the complex structure of the product after the product is formed, and then the mold opening and closing operation is performed, thereby ensuring smooth demolding of the product and ensuring molding accuracy.

[0003] The molding process generates a lot of heat, causing the inside of the mold to be in a high-temperature environment for a long time. The piston rod of the core-pulling cylinder works in this high-temperature environment for a long time and needs to repeatedly extend and retract. The end of the piston rod connected to the core-pulling block and the rod body are easily damaged. Damage to the piston rod will cause the movement of the core-pulling block to deviate, thus making the demolding operation impossible. Therefore, it is necessary to disassemble the cylinder and replace the piston structure.

[0004] However, in the existing technology, the core-pulling cylinder is usually directly fixed to the mold base by multiple bolts. When disassembling, the piston rod needs to be separated from the core-pulling block, and then all the fixing bolts need to be loosened and removed one by one. The process is cumbersome and time-consuming, which reduces the efficiency of replacing the cylinder piston structure and has obvious shortcomings. Utility Model Content

[0005] To improve the efficiency of replacing the cylinder piston structure, this application provides a mold that facilitates the replacement of the cylinder piston structure.

[0006] The mold for facilitating the replacement of the hydraulic cylinder piston structure provided in this application adopts the following technical solution: A mold for easy replacement of the hydraulic cylinder piston structure includes a mold base with a mold cavity for molding. A core-pulling block for core pulling is slidably connected to the mold base. A mounting seat is provided on the mold base, and a hydraulic cylinder for driving the core-pulling block is provided on the mounting seat. A mounting sleeve is provided on the outer surface of the hydraulic cylinder and is fitted onto the outer periphery of the mounting seat. An insertion block is provided on the inner sidewall opposite to the mounting sleeve, and an insertion groove is provided on the mounting seat for insertion and mating with the insertion block.

[0007] By adopting the above technical solution, when the piston rod of the hydraulic cylinder is damaged and needs to be replaced, the worker first disconnects the piston rod from the core-pulling block, and then directly pulls the hydraulic cylinder upward to disengage the insertion block from the insertion slot, thus easily removing the hydraulic cylinder from the mounting base. After the piston structure is replaced, simply align the mounting sleeve of the hydraulic cylinder with the mounting base and insert the insertion block into the insertion slot to achieve the positioning and installation of the hydraulic cylinder. Then, reconnect the piston rod and the core-pulling block to restore the side core-pulling function of the mold. The entire disassembly and assembly process does not require loosening and removing multiple fixing bolts one by one, simplifying the disassembly and assembly process of the hydraulic cylinder and improving the efficiency of replacing the hydraulic cylinder piston structure.

[0008] Optionally, the end of the cylinder piston rod is detachably connected to a push rod via an installation assembly, and the core-pulling block has a connecting groove for the push rod to be inserted into, and the push rod is fixed inside the connecting groove by a limiting assembly.

[0009] By adopting the above technical solution, before the hydraulic cylinder is installed, the hydraulic cylinder piston rod is connected to the push rod through the installation component. After the hydraulic cylinder is installed, the hydraulic cylinder is started, and the hydraulic cylinder piston rod pushes the push rod into the connecting groove. Then, the push rod is fixed to the core-pulling block through the limiting component. In this way, the piston rod does not need to extend directly into the core-pulling block to push and pull the core-pulling block, which shortens the actual extension length of the piston rod. This reduces the length of the piston rod in the high-temperature environment, reduces the possibility of piston rod damage, and improves the service life of the hydraulic cylinder piston rod structure.

[0010] Optionally, the mounting assembly includes a threaded sleeve disposed at the end of the piston rod of the hydraulic cylinder, and the end of the push rod away from the core-pulling block is provided with a threaded section, the threaded section being threadedly connected inside the threaded sleeve.

[0011] By adopting the above technical solution, when the push rod is damaged due to long-term exposure to high temperature environment, the damaged push rod can be separated from the threaded sleeve by simply turning it, and then the threaded section of the new push rod can be screwed into the threaded sleeve to complete the replacement. The operation is simple and quick, without the need to disassemble the entire oil cylinder or replace the piston rod, which reduces the maintenance and replacement cost after the wear and tear of a single component.

[0012] Optionally, the core-pulling block has a limiting groove communicating with the connecting groove. The limiting component includes a limiting piece that is inserted into the limiting groove. The limiting piece has a limiting arc groove that matches the shape of the push rod. A limiting ring is coaxially sleeved on the end of the push rod near the core-pulling block. When the inner wall of the limiting arc groove abuts against the outer surface of the push rod, the limiting piece abuts against the end face of the limiting ring.

[0013] By adopting the above technical solution, after the hydraulic cylinder drives the push rod to be inserted into the connecting groove, the worker inserts and assembles the limiting plate along the limiting groove, so that the inner wall of the limiting arc groove fits against the outer surface of the push rod, thereby achieving radial limiting of the push rod. At the same time, the end face of the limiting plate abuts against the end face of the limiting ring, forming axial limiting of the push rod. Through the synergy of radial and axial dual limiting, the push rod and the core-pulling block are connected, ensuring that the output power of the hydraulic cylinder piston rod can be transmitted to the inside of the core-pulling block, thereby realizing the core-pulling or resetting action.

[0014] Optionally, connecting seats are provided on both opposite sides of the cylinder surface, and a detection rod is slidably inserted inside the connecting seat. The detection rod is detachably connected to the end of the push rod through a connecting assembly. Two detection blocks are sleeved on the outer surface of the detection rod, and a mounting plate is provided on the outer surface of the cylinder. A detection sensor for detecting the position of the detection blocks is provided on the mounting plate.

[0015] By adopting the above technical solution, the connecting component enables a detachable and fixed connection between the detection rod and the push rod. When the push rod performs core pulling or resetting actions under the drive of the hydraulic cylinder, it can simultaneously drive the detection rod to slide along the connecting seat, thereby driving the two detection blocks to move synchronously. The detection sensor on the mounting plate can capture the position signal of the detection block and provide feedback on whether the extension and retraction stroke of the push rod has reached the preset threshold, thereby indirectly realizing the detection of the core pulling end point and the resetting end point position of the core pulling block.

[0016] Optionally, the connecting assembly includes a bolt clamp, one end of which passes through the detection rod, and the other end of which is fixedly sleeved on the outer surface of the push rod by a bolt. The end of the detection rod away from the oil cylinder and the threaded section are both threaded with limiting nuts for limiting the position of the bolt clamp, and the two limiting nuts are respectively located on opposite sides of the bolt clamp.

[0017] By adopting the above technical solution, when connecting the detection rod and the push rod, firstly, a limiting nut is screwed onto the threaded section of the push rod and positioned to a preset position. Then, one end of the bolt clamp is fitted onto the detection rod, and the two clamp flaps at the other end are fitted onto the outer surface of the push rod. The clamp bolt is tightened to form a clamping fixation on the push rod. Finally, another limiting nut is screwed onto the end of the detection rod away from the cylinder. The two limiting nuts abut against the opposite sides of the bolt clamp, forming a bidirectional limiting guide for the bolt clamp. This allows the push rod to slide within the connecting seat via the bolt clamp when it moves. When the push rod needs to be replaced, the worker only needs to unscrew the bolt of the bolt clamp to separate the detection rod from the push rod, thus facilitating the individual replacement of the push rod.

[0018] In summary, this application includes at least one of the following beneficial technical effects: 1. This application, by setting up an installation sleeve and a plug-in block, allows workers to easily remove the cylinder from its mounting base when the piston rod of the hydraulic cylinder is damaged and needs to be replaced. Workers first disconnect the piston rod from the core-pulling block, then directly pull the cylinder upwards to disengage the plug-in block from the plug-in slot. After replacing the piston structure, simply align the cylinder's installation sleeve with the mounting base and insert the plug-in block into the plug-in slot to achieve cylinder positioning. Reconnecting the piston rod and core-pulling block restores the mold's side core-pulling function. The entire disassembly and assembly process eliminates the need to loosen and remove multiple fixing bolts one by one, simplifying the cylinder disassembly and assembly process and improving the efficiency of replacing the cylinder piston structure. 2. This application, by setting up an installation component, a push rod, and a limiting component, connects the hydraulic cylinder piston rod to the push rod via the installation component before the hydraulic cylinder is installed. After the hydraulic cylinder is installed and activated, the hydraulic cylinder piston rod pushes the push rod into the connecting groove. Subsequently, the limiting component fixes the push rod to the core-pulling block. This allows the piston rod to push and pull the core-pulling block without directly extending into it, shortening the actual extension length of the piston rod. This reduces the length of the piston rod in high-temperature environments, lowers the possibility of piston rod damage, and improves the service life of the hydraulic cylinder piston rod structure. Attached Figure Description Figure 1 This is a structural diagram of this application.

[0019] Figure 2 This is a schematic diagram of the installation component and the connection component in the embodiments of this application.

[0020] Figure 3 This is a cross-sectional view of the push rod in an embodiment of this application.

[0021] Explanation of reference numerals in the attached drawings: 1. Mold base; 101. Mold cavity; 102. Guide seat; 2. Core pulling block; 21. Connecting groove; 22. Restricting groove; 3. Mounting seat; 31. Insertion groove; 4. Hydraulic cylinder; 41. Mounting sleeve; 411. Insertion block; 5. Mounting assembly; 51. Threaded sleeve; 52. Threaded section; 6. Push rod; 7. Restricting assembly; 71. Restricting piece; 711. Restricting arc groove; 72. Limiting ring; 8. Connecting seat; 81. Detection rod; 82. Detection block; 9. Connecting assembly; 91. Bolt clamp; 92. Limiting nut; 10. Mounting plate; 1001. Detection sensor. Detailed Implementation

[0022] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0023] This application discloses a mold that facilitates the replacement of the cylinder piston structure.

[0024] Reference Figure 1 and Figure 2A mold for easy replacement of the cylinder piston structure includes a mold base 1, a mold cavity 101 for molding is provided in the mold base 1, a guide seat 102 is installed on one side of the mold base 1, and a core-pulling block 2 for core pulling is slidably connected inside the guide seat 102. In this embodiment, there are two mold cavities 101, two guide seats 102 and two core-pulling blocks 2.

[0025] Reference Figure 1 and Figure 2 Each guide seat 102 is fixedly connected to a mounting seat 3, and a hydraulic cylinder 4 is detachably mounted on the mounting seat 3. Specifically, a mounting sleeve 41 is fixedly connected to the end of the hydraulic cylinder 4 near the piston rod. The mounting sleeve 41 is fitted on the outer periphery of the mounting seat 3. A plug-in block 411 is fixedly connected to the inner side wall of the mounting sleeve 41. The mounting seat 3 is provided with a plug-in groove 31 that is plugged into the plug-in block 411. Through the plug-in groove 31 and the plug-in block 411, the relative displacement of the hydraulic cylinder 4 and the guide seat 102 in the length direction is restricted.

[0026] Reference Figure 2 and Figure 3 The piston rod of the hydraulic cylinder 4 is detachably connected to a push rod 6 via an installation assembly 5. Specifically, the connecting part is a threaded sleeve 51 fixedly connected to the piston rod end of the hydraulic cylinder 4. The end of the push rod 6 away from the core-pulling block 2 is integrally formed with a threaded section 52, which is threadedly connected to the inside of the threaded sleeve 51. The core-pulling block 2 has a connecting groove 21 for inserting the push rod 6 along the length direction of the guide seat 102. The push rod 6 is fixed inside the connecting groove 21 by a limiting assembly 7.

[0027] Reference Figure 2 and Figure 3 The core-pulling block 2 has a limiting groove 22 that communicates with the connecting groove 21. The limiting component 7 includes a limiting piece 71 that is inserted into the limiting groove 22. The limiting piece 71 has a limiting arc groove 711 that matches the shape of the push rod 6. The end of the push rod 6 near the core-pulling block 2 is coaxially fixedly connected to a limiting ring 72. After the limiting piece 71 is inserted into the limiting groove 22, the inner wall of the limiting arc groove 711 abuts against the outer surface of the push rod 6, thereby achieving radial limiting of the push rod 6. At the same time, the end face of the limiting piece 71 abuts against the end face of the limiting ring 72, thereby forming axial limiting of the push rod 6. Through the combined radial and axial limiting, the push rod 6 and the core-pulling block 2 are connected.

[0028] Reference Figure 2 and Figure 3Before the hydraulic cylinder 4 is installed on the mounting base 3, the worker screws the threaded section 52 of the push rod 6 onto the threaded sleeve 51 to connect the push rod 6 to the piston rod of the hydraulic cylinder 4. Then, the mounting sleeve 41 of the hydraulic cylinder 4 is aligned with the mounting base 3 and fitted, and the insertion block 411 is inserted into the insertion groove 31. This achieves the positioning and installation of the hydraulic cylinder 4. After the hydraulic cylinder 4 is installed, the hydraulic cylinder 4 is started. The piston rod of the hydraulic cylinder 4 pushes the push rod 6 into the connecting groove 21. Then, the worker inserts the limiting plate 71 into the limiting groove 22. At this time, the push rod 6 is connected to the core-pulling block 2 under the double limiting of the limiting plate 71. This allows the piston rod to push and pull the core-pulling block 2 without directly extending into the core-pulling block 2, shortening the actual extension length of the piston rod. This reduces the length of the piston rod in the high-temperature environment, reduces the possibility of piston rod damage, and improves the service life of the piston rod structure of the hydraulic cylinder 4. When the push rod 6 is damaged due to prolonged exposure to high temperatures, the worker first pulls out the limiting piece 71, then activates the hydraulic cylinder 4 to pull the push rod 6 away from the connecting groove 21. Finally, the worker pulls the hydraulic cylinder 4 directly upwards to disengage the insertion block 411 from the insertion groove 31, allowing the hydraulic cylinder 4 and push rod 6 to be removed from the mounting base 3. After removing the hydraulic cylinder 4, the worker unscrews the damaged push rod 6 from the threaded sleeve 51 by twisting. Then, the worker screws the threaded section 52 of the new push rod 6 into the threaded sleeve 51 to complete the replacement. The entire disassembly and assembly process is simple and convenient, without the need to disassemble the entire hydraulic cylinder 4 or replace the piston rod, and without the need to loosen and remove multiple fixing bolts one by one. This simplifies the disassembly and assembly process of the hydraulic cylinder 4 and improves the efficiency of replacing the piston structure of the hydraulic cylinder 4.

[0029] Reference Figure 2 and Figure 3 Connecting seats 8 are fixedly installed on both opposite sides of the outer surface of the cylinder 4. Detection rods 81 slide through the two connecting seats 8. The detection rods 81 are detachably connected to the end of the push rod 6 via connecting components 9. Two detection blocks 82 are fixedly sleeved on the outer surface of the detection rods 81. An mounting plate 10 is fixedly installed on the outer surface of the cylinder 4. Detection sensors corresponding to the two detection blocks 82 are installed on the mounting plate 10. The detection sensors are used to detect the position of the corresponding detection block 82. In this embodiment, the detection sensors are proximity sensors.

[0030] Reference Figure 2 and Figure 3 The connecting component 9 includes a bolt clamp 91. The specific structure of the bolt clamp 91 is existing technology and will not be described in detail in this embodiment. One end of the bolt clamp 91 passes through the outer surface of the detection rod 81, and the clamp flap at the other end is fixedly sleeved on the outer surface of the push rod 6 by bolts. The end of the detection rod 81 away from the oil cylinder 4 and the threaded section 52 are both threadedly connected with limiting nuts 92 for limiting the position of the bolt clamp 91. The two limiting nuts 92 are respectively set on opposite sides of the bolt clamp 91.

[0031] When initially connecting the push rod 6 and the detection rod 81, before connecting the push rod 6 to the threaded sleeve 51, first screw a limiting nut 92 onto the threaded section 52 of the push rod 6 and position it to a preset position. Then, place one end of the bolt clamp 91 onto the detection rod 81, and the other end of the two clamp flaps onto the outer surface of the push rod 6. Tighten the clamp bolt to form a clamping fixation on the push rod 6. Finally, screw another limiting nut 92 onto the end of the detection rod 81 away from the cylinder 4. The two limiting nuts 92 respectively abut against the opposite sides of the bolt clamp 91, forming a clamping fixation on the push rod 6. The bidirectional limiting guide of the bolt clamp 91 allows the push rod 6 to slide within the connecting seat 8 via the bolt clamp 91 when it moves. The detection sensor on the mounting plate 10 captures the position signal of the detection block 82 and can provide feedback on whether the extension and retraction stroke of the push rod 6 has reached the preset threshold, thereby indirectly detecting the core-pulling end point and reset end point position of the core-pulling block 2. When the push rod 6 needs to be replaced, the worker only needs to unscrew the bolt of the bolt clamp 91 to separate the detection rod 81 from the push rod 6, thus facilitating the individual replacement of the push rod 6 in the future.

[0032] The implementation principle of a mold for easy replacement of hydraulic cylinder piston structure in this application embodiment is as follows: Before the hydraulic cylinder 4 is installed on the mounting base 3, the worker screws the threaded section 52 of the push rod 6 with the threaded sleeve 51 to connect the push rod 6 with the piston rod of the hydraulic cylinder 4. Then, the mounting sleeve 41 of the hydraulic cylinder 4 is aligned with the mounting base 3 and fitted, and the plug block 411 is inserted into the plug groove 31. This achieves the positioning and installation of the hydraulic cylinder 4. After the hydraulic cylinder 4 is installed, the hydraulic cylinder 4 is started. The piston rod of the hydraulic cylinder 4 pushes the push rod 6 into the connecting groove 21. Then, the worker inserts the limiting piece 71 into the limiting groove 22. At this time, the push rod 6 is connected to the core-pulling block 2 under the double limiting of the limiting piece 71. This allows the piston rod to push and pull the core-pulling block 2 without directly extending into the core-pulling block 2, shortening the actual extension length of the piston rod. This reduces the length of the piston rod in the high-temperature environment, reduces the possibility of piston rod damage, and improves the service life of the piston rod structure of the hydraulic cylinder 4. When the push rod 6 is damaged due to prolonged exposure to high temperatures, the worker first pulls out the limiting piece 71, then activates the hydraulic cylinder 4 to pull the push rod 6 away from the connecting groove 21. Finally, the worker pulls the hydraulic cylinder 4 directly upwards to disengage the insertion block 411 from the insertion groove 31, allowing the hydraulic cylinder 4 and push rod 6 to be removed from the mounting base 3. After removing the hydraulic cylinder 4, the worker unscrews the damaged push rod 6 from the threaded sleeve 51 by twisting. Then, the worker screws the threaded section 52 of the new push rod 6 into the threaded sleeve 51 to complete the replacement. The entire disassembly and assembly process is simple and convenient, without the need to disassemble the entire hydraulic cylinder 4 or replace the piston rod, and without the need to loosen and remove multiple fixing bolts one by one. This simplifies the disassembly and assembly process of the hydraulic cylinder 4 and improves the efficiency of replacing the piston structure of the hydraulic cylinder 4.

[0033] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A mold for easy replacement of the piston structure of a hydraulic cylinder, comprising a mold base (1), wherein a mold cavity (101) for molding is provided in the mold base (1), and a core-pulling block (2) for core pulling is slidably connected on the mold base (1), characterized in that, The mold base (1) is provided with a mounting base (3), and the mounting base (3) is provided with a hydraulic cylinder (4) for driving the core-pulling block (2) to move. The outer surface of the hydraulic cylinder (4) is provided with a mounting sleeve (41), and the mounting sleeve (41) is fitted on the outer periphery of the mounting base (3). The inner sidewall opposite to the mounting sleeve (41) is provided with a plug-in block (411), and the mounting base (3) is provided with a plug-in groove (31) for plugging and engaging with the plug-in block (411).

2. The mold for easy replacement of the hydraulic cylinder piston structure according to claim 1, characterized in that, The piston rod of the cylinder (4) is detachably connected to a push rod (6) via an installation assembly (5). The core-pulling block (2) has a connecting groove (21) for the push rod (6) to be inserted. The push rod (6) is fixed inside the connecting groove (21) by a limiting assembly (7).

3. The mold for easy replacement of the hydraulic cylinder piston structure according to claim 2, characterized in that, The mounting assembly (5) includes a threaded sleeve (51) disposed at the end of the piston rod of the cylinder (4), and the end of the push rod (6) away from the core-pulling block (2) is provided with a threaded section (52), which is threadedly connected inside the threaded sleeve (51).

4. The mold for easy replacement of the hydraulic cylinder piston structure according to claim 2, characterized in that, The core-pulling block (2) has a limiting groove (22) that communicates with the connecting groove (21). The limiting component (7) includes a limiting piece (71) that is inserted into the limiting groove (22). The limiting piece (71) has a limiting arc groove (711) that matches the shape of the push rod (6). The end of the push rod (6) near the core-pulling block (2) is coaxially fitted with a limiting ring (72). When the inner wall of the limiting arc groove (711) abuts against the outer surface of the push rod (6), the limiting piece (71) abuts against the end face of the limiting ring.

5. A mold for easy replacement of the hydraulic cylinder piston structure according to claim 3, characterized in that, Connecting seats (8) are provided on both opposite sides of the surface of the oil cylinder (4). A detection rod (81) is slidably inserted inside the connecting seat (8). The detection rod (81) is detachably connected to the end of the push rod (6) through the connecting assembly (9). Two detection blocks (82) are sleeved on the outer surface of the detection rod (81). An mounting plate (10) is provided on the outer surface of the oil cylinder (4). A detection sensor for detecting the position of the detection blocks (82) is provided on the mounting plate (10).

6. The mold for easy replacement of the hydraulic cylinder piston structure according to claim 5, characterized in that, The connecting assembly (9) includes a bolt clamp (91), one end of which is inserted through the detection rod (81), and the clamp flap at the other end is fixedly sleeved on the outer surface of the push rod (6) by bolts. The end of the detection rod (81) away from the oil cylinder (4) and the threaded section (52) are both threaded with limiting nuts (92) for limiting the position of the bolt clamp (91). The two limiting nuts (92) are respectively arranged on opposite sides of the bolt clamp (91).

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