A nested die clamping mechanism and a matched cylinder liner dismounting tool

Abstract

The utility model discloses a nested die mechanism and matched cylinder sleeve dismounting tool. On the one hand, the utility model provides a kind of nested die mechanism, including forming carousel, is provided with a plurality of die oil cylinder on the forming carousel;The die oil cylinder includes the oil cylinder inner hole that penetrates the upper and lower surfaces of forming carousel, detachably nested setting has cylinder sleeve in the oil cylinder inner hole, the die piston rod is sleeved in the middle gap of the cylinder sleeve, the middle part of the die piston rod is sleeved with the separation component, the separation component is slidably matched with cylinder sleeve, is provided with oil circuit system in the forming carousel, the both ends of the die piston rod are slidably sleeved with cylinder cover, and the both cylinder covers are respectively detachably connected with the upper and lower surfaces of forming carousel. On the other hand, the utility model further provides a kind of cylinder sleeve dismounting tool matched with the above-mentioned nested die mechanism. The utility model can reduce the wear and tear of oil cylinder inner hole, ensure the stability of long-term operation of die mechanism.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, and in particular to a nested mold closing mechanism and a matching cylinder liner disassembly and assembly tool. Background Technology

[0002] In industrial production, especially in manufacturing and heavy equipment manufacturing, hydraulic drive is an important driving method. Compression molding equipment also uses a hydraulically driven mold-closing mechanism. To ensure production efficiency, this mechanism needs to accommodate as many hydraulic cylinders as possible on a molding turntable of the same diameter. Therefore, to maximize the number of mold-closing cylinders on the molding turntable and to ensure compact interconnection of the cylinder pipelines, the common practice is to share a single base for multiple cylinder barrels. This involves machining multiple equally spaced cylinder bores on the circumference of the molding turntable, while simultaneously arranging the corresponding oil passages and holes for each cylinder as a single, integrated mold-closing mechanism on the molding turntable, forming a compact, one-piece mold-closing mechanism that eliminates the need for external piping from the control valve to the cylinder.

[0003] Currently, the requirements for production stability and efficiency of compression molding equipment are becoming increasingly stringent. To improve equipment efficiency, the molding cycle of products needs to be shortened, meaning the interval between mold closing mechanisms in each compression molding machine must be reduced. With long-term operation, the cumulative number of mold closing operations increases; assuming 300 days of 24-hour operation per year, this can reach an astonishing ten million times. In actual operation, it has been found that the piston seal of the piston rod in the mold closing mechanism, due to prolonged contact with the inner bore of the hydraulic cylinder inside the molding turntable, gradually wears down. After several years of wear, the leakage between the piston seal and the cylinder gradually increases, reducing the mold closing efficiency of the hydraulic cylinder and increasing the energy consumption of the hydraulic system. However, since the existing forming turntable is a single structure, the repair of the cylinder bore after wear is difficult. Moreover, its interior not only includes the cylinder bore, but also integrates the oil circuit, control valve mounting position, cylinder upper and lower cover installation, and other installation functions. The processing is difficult and the value is high. Therefore, how to ensure the long-term stable operation of the cylinder bore and avoid the need to repair the cylinder bore and replace the entire mold closing mechanism during the entire machine life is a difficult problem. Utility Model Content

[0004] The purpose of this utility model is to provide a nested mold closing mechanism and a matching cylinder liner disassembly and assembly tool. By using the cylinder liner disassembly and assembly tool to nest the cylinder liner in the inner hole of the oil cylinder of the mold closing mechanism, the wear of the inner hole of the oil cylinder can be reduced, thereby effectively ensuring the long-term stability of the mold closing mechanism and extending the service life of the mold closing mechanism.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] On one hand, the present invention provides a nested mold closing mechanism, including a forming turntable, on which a plurality of mold closing cylinders are provided; each mold closing cylinder includes an inner cylinder hole penetrating the upper and lower surfaces of the forming turntable, a cylinder sleeve is detachably nested in the inner cylinder hole, a mold closing piston rod is sleeved in the cylinder sleeve with a gap, and a separating component is sleeved in the middle of the mold closing piston rod, which can separate the inner cylinder hole into an upper cylinder cavity and a lower cylinder cavity that are not interconnected. The separating component slides with the cylinder sleeve. Furthermore, an oil circuit system is provided in the forming turntable, and both the upper and lower cylinder cavities are connected to the oil circuit system. Additionally, cylinder covers are slidably sleeved at both ends of the mold closing piston rod, and the two cylinder covers are detachably connected to the upper and lower surfaces of the forming turntable, respectively.

[0007] Furthermore, the cylinder cover includes an upper cylinder cover and a lower cylinder cover, wherein the upper cylinder cover is slidably engaged with the upper end of the mold closing piston rod and is connected to the upper surface of the forming turntable by an upper cover screw, and the lower cylinder cover is slidably engaged with the lower end of the mold closing piston rod and is connected to the lower surface of the forming turntable by a lower cover screw.

[0008] Furthermore, a boss is provided on the top of the lower cover of the cylinder. The upper end of the boss extends into the inner hole of the cylinder and abuts against the lower end of the cylinder liner. A side hole is provided on the side wall of the boss. The lower cavity of the cylinder, the side hole, and the oil circuit system are connected in sequence.

[0009] Furthermore, the oil circuit system includes an upper chamber channel, a lower chamber channel, and a switching valve. The upper chamber channel is connected to the upper chamber of the oil cylinder. One end of the lower chamber channel is connected to the lower chamber of the oil cylinder via a side hole, and the other end of the lower chamber channel is connected to a low-pressure oil circuit, a high-pressure oil circuit, and a return oil circuit via the switching valve. The end of the upper chamber channel away from the upper chamber of the oil cylinder is connected to the low-pressure oil circuit, and a pressure reducing valve and an accumulator are installed on the low-pressure oil circuit.

[0010] Furthermore, the inner bore of the cylinder has a stepped structure with the inner diameter decreasing from bottom to top, and the cylinder liner has a stepped structure with the outer diameter decreasing from bottom to top. In addition, an intermediate sealing element is fitted between the inner wall of the inner bore of the cylinder and the outer wall of the cylinder liner.

[0011] Furthermore, an upper cover seal is fitted between the outer wall of the mold closing piston rod and the inner wall of the upper cover of the oil cylinder, and a lower cover seal is fitted between the outer wall of the mold closing piston rod and the inner wall of the lower cover of the oil cylinder.

[0012] On the other hand, the present invention provides a cylinder liner disassembly and assembly tool, including a tooling plate, a screw, and at least one support rod. The tooling plate is detachably connected to the cylinder liner by at least one tooling screw. One end of the screw is fixedly connected to the tooling plate, and the other end of the screw is slidably fitted with a support plate. One end of the support rod is detachably connected to a forming turntable, and the other end of the support rod is connected to the support plate. Two drive nuts are threaded onto the screw, and the two drive nuts are respectively located on both sides of the support plate.

[0013] Furthermore, there are two support rods, which are symmetrically arranged at both ends of the support plate.

[0014] Furthermore, the support plate has a first through hole and at least one second through hole, wherein the first through hole is slidably sleeved with the screw, and the end of the support rod away from the cylinder sleeve passes through the second through hole and is threadedly connected to a limiting nut, and the limiting nut abuts against the support plate.

[0015] Due to the adoption of the above structure, the beneficial effects of this utility model are as follows:

[0016] This invention separates the cylinder bore from the separator by nesting a cylinder liner inside the cylinder bore. When the hydraulic system supplies oil to the upper or lower chamber of the cylinder to drive the mold closing piston rod and the separator to move axially, the cylinder liner bears the wear caused by the separator during its movement, thus protecting the cylinder bore that is integrated with the forming turntable. Furthermore, by providing a removable cylinder cover, when the cylinder liner is worn, the cylinder cover can be removed from the forming turntable, exposing the cylinder bore and the cylinder liner inside it. This allows the cylinder liner to be removed from the cylinder bore for replacement, effectively ensuring the long-term stability of the mold closing mechanism and extending its service life.

[0017] The present invention will become clearer from the following description and in conjunction with the accompanying drawings, which are used to explain the embodiments of the present invention. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a perspective view of Embodiment 1 of the present utility model;

[0020] Figure 2 This is a front view of Embodiment 1 of the present invention;

[0021] Figure 3 This is a schematic diagram of the internal structure of the mold-closing cylinder according to Embodiment 1 of this utility model;

[0022] Figure 4 This is a top view of Embodiment 1 of the present utility model;

[0023] Figure 5 This is a schematic diagram of the oil circuit system according to Embodiment 1 of this utility model;

[0024] Figure 6 This is a perspective view of Embodiment 2 of the present invention, wherein the mold closing cylinder is a schematic structure partially cut out from the forming turntable.

[0025] Reference numerals in the attached diagram: Forming turntable-1, Mold closing cylinder-2, Cylinder liner-3, Mold closing piston rod-4, Separator assembly-5, Oil circuit system-, Cylinder head-, Cylinder upper cover-6, Cylinder lower cover-7, Boss-701, Side hole-702, Upper cover screw-8, Lower cover screw-9, Upper cavity channel-10, Lower cavity channel-11, Switching valve-12, Low-pressure oil circuit-13, High-pressure oil circuit-14, Return oil circuit-15, Pressure reducing valve-16, Accumulator-17, Intermediate seal-18, Upper cover seal-19, Lower cover seal-20, Support rod-21, Support plate-22, Limit nut-23, Screw-24, Drive nut-25, Tooling plate-26, Tooling screw-27, One-way valve-28, Cam-29. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Example 1

[0028] Please refer to Figures 1 to 4This embodiment provides a nested mold closing mechanism, including a forming turntable 1, on which a plurality of mold closing cylinders 2 are provided; each mold closing cylinder 2 includes an inner cylinder hole penetrating the upper and lower surfaces of the forming turntable 1, the inner cylinder hole being integrally formed with the forming turntable 1; a cylinder sleeve 3 is detachably nested in the inner cylinder hole, and a mold closing piston rod 4 is fitted with a gap in the cylinder sleeve 3; a separating component 5 is fitted in the middle of the mold closing piston rod 4, which can separate the inner cylinder hole into an upper cylinder cavity and a lower cylinder cavity that are not interconnected; the separating component 5 is slidably engaged with the cylinder sleeve 3; and an oil circuit system is provided inside the forming turntable 1, with both the upper and lower cylinder cavities connected to the oil circuit system; and cylinder covers are slidably fitted at both ends of the mold closing piston rod 4, with the two cylinder covers being detachably connected to the upper and lower surfaces of the forming turntable 1 respectively.

[0029] When the oil circuit system supplies oil to the upper or lower chamber of the cylinder, the oil can fill the upper or lower chamber of the cylinder, thereby driving the mold closing piston rod 4 and the separating assembly 5 to move axially through the pressure difference between the upper and lower chambers of the cylinder. Furthermore, since the cylinder liner 3 is located between the separating assembly 5 and the inner bore of the cylinder, the movement of the separating assembly 5 only causes wear to the cylinder liner 3, thus protecting the inner bore of the cylinder and greatly extending the service life of the inner bore of the cylinder.

[0030] The cylinder head is slidably sleeved on the outside of the mold-closing piston rod 4. The inner wall of the cylinder head is in contact with the outer wall of the mold-closing piston rod 4, and the side of the cylinder head near the forming turntable 1 is in contact with the surface of the forming turntable 1. This forms a seal that covers the end of the cylinder bore, creating a closed chamber between the upper and lower cylinder chambers, preventing the oil in the upper and lower cylinder chambers from being exposed to the outside. Furthermore, when the cylinder liner 3 is worn or other problems occur, the cylinder head can be removed from the forming turntable 1, exposing the cylinder bore and the cylinder liner 3 inside it. This allows the cylinder liner 3 to be removed from the cylinder bore for replacement, effectively... This ensures that even after many years of use, the forming turntable 1 does not need to be replaced, thus guaranteeing the long-term stability of the mold closing mechanism and extending its service life. In addition, the cylinder liner 3 can be removed separately and made of a better material than the forming turntable 1, or it can be heat-treated and honed separately, thereby reducing the processing difficulty and making it easier to obtain a higher quality cylinder liner 3. This better improves the smoothness of the movement of the mold closing piston rod 4 and the sealing between the upper and lower chambers of the cylinder. Correspondingly, the machining accuracy of the cylinder inner hole can be reduced to a certain extent, effectively reducing the processing difficulty of the forming turntable 1.

[0031] The separating component 5 includes a piston sleeve, which is located in the middle of the piston rod 1 and is integrally formed with the piston rod 1 by welding or casting. The piston sleeve is slidably sleeved with the cylinder liner 3 on the same axis. When the mold closing piston rod 4 and the piston sleeve move axially under the drive of the oil, the outer wall of the piston sleeve and the inner wall of the cylinder liner 3 are in frictional contact, which will cause wear to the cylinder liner 3. In addition, a sealing rubber ring is provided on the piston sleeve to improve the sealing performance and effectively prevent the oil in the upper chamber and lower chamber of the oil cylinder from leaking through the gap between the inner wall of the inner hole of the oil cylinder and the outer wall of the piston sleeve.

[0032] In this embodiment, the cylinder cover includes an upper cylinder cover 6 and a lower cylinder cover 7. The upper cylinder cover 6 is slidably engaged with the upper end of the mold closing piston rod 4 and is connected to the upper surface of the forming turntable 1 by an upper cover screw 8. The lower cylinder cover 7 is slidably engaged with the lower end of the mold closing piston rod 4 and is connected to the lower surface of the forming turntable 1 by a lower cover screw 9.

[0033] The mold clamping cylinder 2 includes an upper mounting hole and a lower mounting hole. The upper mounting holes are located on the upper surface of the forming turntable 1, and the number of upper mounting holes is equal to the number of upper cover screws 8. The upper cover 6 of the cylinder is threadedly connected to the upper mounting holes through the upper cover screws 8, thereby fixing the upper cover 6 of the cylinder to the upper surface of the forming turntable 1 and facilitating disassembly. The lower mounting holes are located on the lower surface of the forming turntable 1, and the number of lower mounting holes is equal to the number of lower cover screws 9. The lower cover 7 of the cylinder is threadedly connected to the lower mounting holes through the lower cover screws 9, thereby fixing the lower cover 7 of the cylinder to the lower surface of the forming turntable 1 and facilitating disassembly.

[0034] In this embodiment, a boss 701 extends from the top of the lower cover 7 of the oil cylinder. The upper end of the boss 701 extends into the inner hole of the oil cylinder and abuts against the lower end of the cylinder sleeve 3, thereby achieving a positioning effect and preventing the cylinder sleeve 3 from dislodging from the inner hole of the oil cylinder away from the upper cover 6 of the oil cylinder. Furthermore, a side hole 702 is provided on the side wall of the boss 701. The lower cavity of the oil cylinder, the side hole 702, and the oil circuit system are connected in sequence, so that the boss 701 can abut against the cylinder sleeve 3 while preventing the boss 701 from blocking the flow of oil between the lower cavity of the oil cylinder and the oil circuit system.

[0035] In this embodiment, the inner bore of the cylinder is a stepped structure with the inner diameter decreasing from bottom to top, and the cylinder liner 3 is a stepped structure with the outer diameter decreasing from bottom to top. The inner bore of the cylinder and the cylinder liner 3 correspond in size and are both stepped structures, which can play a positioning role and prevent the cylinder liner 3 from dislodging from the inner bore of the cylinder from the direction away from the lower cover 7 of the cylinder.

[0036] Preferably, an intermediate seal 18 is provided between the inner wall of the cylinder bore and the outer wall of the cylinder liner 3 to effectively prevent oil in the upper and lower chambers of the cylinder from leaking through the gap between the inner wall of the cylinder bore and the outer wall of the cylinder liner 3.

[0037] An upper cover seal 19 is fitted between the outer wall of the mold closing piston rod 4 and the inner wall of the upper cover 6 of the oil cylinder, which is used to isolate the upper cavity of the oil cylinder from the outside world and prevent the oil in the upper cavity of the oil cylinder from leaking through the gap between the outer wall of the mold closing piston rod 4 and the inner wall of the upper cover 6 of the oil cylinder.

[0038] A lower cover seal 20 is fitted between the outer wall of the mold closing piston rod 4 and the inner wall of the lower cover 7 of the oil cylinder, which is used to isolate the lower cavity of the oil cylinder from the outside world and prevent the oil in the lower cavity of the oil cylinder from leaking through the gap between the outer wall of the mold closing piston rod 4 and the inner wall of the lower cover 7 of the oil cylinder.

[0039] The intermediate seal 18, the lower cover seal 20, and the upper cover seal 19 are all sealing rings made of rubber or silicone.

[0040] Please refer to Figure 5 The oil circuit system includes an upper chamber channel 10, a lower chamber channel 11, and a switching valve 12. The upper chamber channel 10 is connected to the upper chamber of the oil cylinder. One end of the lower chamber channel 11 is connected to the lower chamber of the oil cylinder through a side hole 702, and the other end of the lower chamber channel 11 is connected to a low-pressure oil circuit 13, a high-pressure oil circuit 14, and a return oil circuit 15 through the switching valve 12. The end of the upper chamber channel 10 away from the upper chamber of the oil cylinder is connected to the low-pressure oil circuit 13, and a pressure reducing valve 16 and an accumulator 17 are provided on the low-pressure oil circuit 13.

[0041] The low-pressure oil circuit 13 is used to connect to an external low-pressure oil supply device. When the low-pressure oil circuit 13 is connected to the lower chamber of the cylinder via the switching valve 12 and the lower chamber passage 11 in sequence, the low-pressure oil circuit 13 inputs low-pressure oil into the lower chamber of the cylinder, forming a low-pressure P in the lower chamber. L Simultaneously, the oil in the low-pressure oil circuit 13 is transported to the upper chamber of the cylinder via the upper chamber channel 10 and is reduced in pressure by the pressure reducing valve 16, resulting in a pressure lower than the low-pressure P in the lower chamber. L Upper chamber pressure P L1 Therefore, it can drive the mold closing piston rod 4 to move upward to achieve rapid mold closing. At this time, the oil in the upper cavity of the cylinder flows back and is temporarily stored in the upper cavity channel 10 by the accumulator 17.

[0042] The high-pressure oil circuit 14 is used to connect to an external high-pressure oil supply device. When the high-pressure oil circuit 14 is connected to the lower chamber of the cylinder via the switching valve 12 and the lower chamber channel 11 in sequence, the high-pressure oil circuit 14 inputs high-pressure oil into the lower chamber of the cylinder, forming a high-pressure P in the lower chamber. H Due to the high pressure P in the lower chamber H >Lower chamber low pressure P L > Upper cavity pressure P L1This allows for greater clamping force, continuously applying greater pressure to the material inside the mold at a slower speed to overcome the resistance to material deformation, thus molding the internal material and achieving high-pressure clamping.

[0043] The return oil passage 15 is used to connect to an external oil storage device. When the return oil passage 15 is connected to the lower chamber of the cylinder via the switching valve 12 and the lower chamber passage 11 in sequence, a return oil pressure P is formed. T At this time, the pressure in the lower chamber is close to 0, and the mold closing piston rod 4 is under pressure P in the upper chamber. L1 Driven by the current, it moves downwards to achieve mold opening.

[0044] Preferably, the length of the cylinder liner 3 is shorter than the length of the cylinder bore, so that both ends of the cylinder bore have sufficient length for openings to connect the upper cavity channel 10 and the lower cavity channel 11 respectively.

[0045] Preferably, the switching valve 12 is a spool valve type directional valve. The switching valve 12 is installed on the lower surface of the molding turntable 1. When the motor drives the molding turntable 1 to rotate, it drives the switching valve 12 to rotate. The valve core of the switching valve 12 contacts and engages with the cam 29 fixedly installed on the base of the compression molding equipment, allowing the valve core of the switching valve 12 to achieve separate connections between the low-pressure oil circuit 13, the high-pressure oil circuit 14, the return oil circuit 15, and the lower chamber channel 11 at different positions, thus achieving low-pressure P in the lower chamber. L Lower chamber high pressure P H Return oil pressure P T Switching.

[0046] Preferably, the upper cavity channel 10 is further provided with a bypass with a one-way valve 28, the bypass crossing the pressure reducing valve 16 and the two ends of the bypass being connected to the upstream and downstream of the upper cavity channel 10 respectively; when the upper cavity pressure P L1 <lower chamber pressure P L When the outlet pressure of pressure reducing valve 16 is lower than the inlet pressure, the one-way valve 28 closes; when the upper chamber pressure P... L1 >Lower chamber low pressure P L When the outlet pressure of pressure reducing valve 16 is higher than the inlet pressure, the valve core of pressure reducing valve 16 will tend to close. At this time, check valve 28 will open, and the oil flowing backward in the upper chamber channel 10 can bypass pressure reducing valve 16 through the bypass, thereby ensuring the upper chamber pressure P. L1 The pressure shouldn't be too high.

[0047] Working principle:

[0048] When the mold of the compression molding equipment receives the granules of rubber to be molded, firstly, the switching valve 12 switches to a state that connects the low-pressure oil circuit 13 with the lower chamber channel 11. The low-pressure oil circuit 13 sequentially feeds low-pressure oil into the lower chamber of the cylinder through the switching valve 12, the lower chamber channel 11, and the side hole 702, forming a low-pressure P in the lower chamber. LMeanwhile, the low-pressure oil in the low-pressure oil circuit 13 is delivered to the upper chamber of the cylinder after being reduced in pressure through the upper chamber channel 10 and the pressure reducing valve 16, forming a pressure lower than the low pressure P in the lower chamber. L Upper chamber pressure P L1 Lower chamber low pressure P L With upper chamber pressure P L1 A pressure difference is formed between them, driving the mold closing piston rod 4 to move upward, which in turn pushes the moving mold in the mold to move closer to the fixed mold, realizing rapid mold closing. At this time, the oil in the upper cavity of the cylinder flows back and is temporarily stored by the accumulator 17 in the upper cavity channel 10. When the mold is almost closed and the moving mold and the fixed mold cooperate to squeeze the rubber material, the load resistance increases due to the presence of the rubber material. The switching valve 12 switches to the state that connects the high-pressure oil circuit 14 with the lower cavity channel 11. The high-pressure oil circuit 14 sequentially inputs the high-pressure oil into the lower cavity of the cylinder through the switching valve 12, the lower cavity channel 11, and the side hole 702, forming a high-pressure P in the lower cavity. H This provides a greater clamping force, driving the moving mold to continuously apply greater pressure to the rubber material inside the mold at a slower speed to overcome the resistance of the rubber material deformation until the internal rubber material is molded, completing the high-pressure mold closing. That is, the mold closing action logic of the mold closing mechanism is to use low-pressure and fast mold closing in the initial large stroke stage, and switch to high-pressure and low-speed mold closing when the mold is close to the completion of mold closing. This ensures both the speed of the mold closing action and the quality of the molded product. After the product is compressed and molded, the switching valve 12 switches to the state that connects the return oil passage 15 with the lower cavity channel 11. The return oil passage 15 is connected to the lower cavity of the cylinder in sequence through the switching valve 12, the lower cavity channel 11, and the side hole 702, forming a return oil pressure P with a pressure close to 0. T The oil temporarily stored in the accumulator 17 flows back into the upper chamber of the cylinder through the upper chamber channel 10, forming an upper chamber pressure P. L1 Return oil pressure P T With upper chamber pressure P L1 A pressure difference is created between the mold cylinders, driving the mold-closing piston rod 4 downwards, causing the moving mold to separate from the fixed mold, thus opening the mold. This process is repeated to achieve continuous compression molding of the product. Multiple mold-closing cylinders 20 repeat this process to achieve batch compression molding of the product.

[0049] Example 2

[0050] Please refer to Figure 6This embodiment provides a cylinder liner disassembly and assembly tool, which is used in conjunction with a nested mold closing mechanism for disassembling and assembling cylinder liners 3. The tool includes a tooling plate 26, a screw 24, and at least one support rod 21. The tooling plate 26 is detachably connected to the cylinder liner 3 by at least one tooling screw 27. One end of the screw 24 is fixedly connected to the tooling plate 26, and the other end of the screw 24 is slidably fitted with a support plate 22. One end of the support rod 21 is detachably connected to the forming turntable 1, and the other end of the support rod 21 is connected to the support plate 22. Two drive nuts 25 are threaded onto the screw 24, and the two drive nuts 25 are located on both sides of the support plate 22.

[0051] Specifically, one end of the support rod 21 is detachably connected to the lower mounting hole via a threaded connection, thereby achieving a detachable connection between the support rod 21 and the forming turntable 1.

[0052] Preferably, there are two support rods 21, which are symmetrically arranged at both ends of the support plate 22 to form a U-shaped frame structure with better stability and support. There are four tooling screws 27, which are arranged around the tooling plate 26. The end face of the cylinder liner 3 near the lower cover 7 of the cylinder is provided with a connecting hole for threaded engagement with the tooling screws 27, thereby realizing the fixed connection between the tooling plate 26 and the cylinder liner 3.

[0053] In this embodiment, the support plate 22 has a first through hole and at least one second through hole. The first through hole is slidably sleeved with the screw 24. The end of the support rod 21 away from the cylinder liner 3 passes through the second through hole and is threadedly connected to a limiting nut 23. The limiting nut 23 abuts against the support plate 22. Specifically, the end of the support rod 21 that mates with the limiting nut 23 has a threaded section with a diameter smaller than the diameter of the support rod 21. The end of the threaded section away from the support rod 21 passes through the second through hole and is threadedly connected to the limiting nut 23. This allows the support plate 22 to be clamped between the end face of the threaded section of the support rod 21 and the limiting nut 23, and the support rod 21 can rotate axially when the limiting nut 23 is loosened.

[0054] Working principle:

[0055] When it is necessary to remove the cylinder liner 3 from the cylinder bore, first turn the lower cover screw 9 to remove the cylinder lower cover 7 from the forming turntable 1, exposing the cylinder bore and the end of the cylinder liner 3 away from the cylinder upper cover 6. Then, fix one end of the support rod 21 to the forming turntable 1 through the lower mounting hole, and lock the support plate 22 onto the support rod 21 with the limit nut 23. At the same time, cover the end of the cylinder liner 3 near the cylinder lower cover 7 and screw the tooling screw 27 into the connecting hole until the tooling plate 27 is locked onto the cylinder liner 3. Then, rotate the drive nut 25 located on the side of the support plate 22 near the tooling plate 27, so that it abuts against the support plate 22 and moves away from the forming turntable 1. The drive nut 25 moves relative to the screw 24. This allows the cylinder liner 3 to be pulled out of the cylinder bore sequentially via the screw 24, tooling plate 27, and limiting nut 23. During the disassembly process, the drive nut 25 located on the side of the support plate 22 away from the tooling plate 27 should avoid abutting against the support plate 22. If it is necessary to install the cylinder liner 3 into the cylinder bore, reverse the drive nut 25 located on the side of the support plate 22 away from the tooling plate 27, so that it abuts against the support plate 22 and moves towards the forming turntable 1. The drive nut 25 moves relative to the screw 24, thereby allowing the cylinder liner 3 to be pushed into the cylinder bore sequentially via the screw 24 and tooling plate 27. During the installation process, the drive nut 25 located on the side of the support plate 22 near the tooling plate 27 should avoid abutting against the support plate 22.

[0056] The preferred embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above. Devices and structures not described in detail herein should be understood as being implemented in a conventional manner within the art. Any person skilled in the art can make many possible variations and modifications to the technical solutions of this utility model using the disclosed methods and techniques, or modify them into equivalent embodiments with equivalent changes, without departing from the scope of the technical solution of this utility model. This does not affect the essential content of this utility model. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model, without departing from the content of the technical solution of this utility model, still fall within the protection scope of the technical solution of this utility model.

Claims

1. A nest type clamping mechanism comprising a molding turntable (1) on which a plurality of clamping cylinders (2) are provided; characterized in that: The mold-closing cylinder (2) includes an inner cylinder hole that penetrates the upper and lower surfaces of the forming turntable (1). A cylinder sleeve (3) is detachably nested in the inner cylinder hole. A mold-closing piston rod (4) is fitted in the cylinder sleeve (3) with a gap. A partition component (5) is fitted in the middle of the mold-closing piston rod (4) to separate the inner cylinder hole into an upper cylinder cavity and a lower cylinder cavity that are not connected to each other. The partition component (5) is slidably fitted with the cylinder sleeve (3). Furthermore, an oil circuit system is provided in the forming turntable (1). The upper cylinder cavity and the lower cylinder cavity are both connected to the oil circuit system. Additionally, cylinder covers are slidably fitted at both ends of the mold-closing piston rod (4). The two cylinder covers are detachably connected to the upper and lower surfaces of the forming turntable (1), respectively.

2. A nesting clamp mechanism according to claim 1 wherein: The cylinder cover includes an upper cylinder cover (6) and a lower cylinder cover (7). The upper cylinder cover (6) is slidably fitted with the upper end of the mold closing piston rod (4) and is connected to the upper surface of the forming turntable (1) by an upper cover screw (8). The lower cylinder cover (7) is slidably fitted with the lower end of the mold closing piston rod (4) and is connected to the lower surface of the forming turntable (1) by a lower cover screw (9).

3. A nesting clamp mechanism according to claim 2, wherein: The top of the lower cover (7) of the oil cylinder is provided with a boss (701). The upper end of the boss (701) extends into the inner hole of the oil cylinder and abuts against the lower end of the cylinder sleeve (3). Furthermore, the side wall of the boss (701) is provided with a side hole (702). The lower cavity of the oil cylinder, the side hole (702), and the oil circuit system are connected in sequence.

4. A nesting clamp mechanism according to claim 3 wherein: The oil circuit system includes an upper chamber channel (10), a lower chamber channel (11), and a switching valve (12). The upper chamber channel (10) is connected to the upper chamber of the oil cylinder. One end of the lower chamber channel (11) is connected to the lower chamber of the oil cylinder through a side hole (702), and the other end of the lower chamber channel (11) is connected to a low-pressure oil circuit (13), a high-pressure oil circuit (14), and a return oil circuit (15) through the switching valve (12). The end of the upper chamber channel (10) away from the upper chamber of the oil cylinder is connected to the low-pressure oil circuit (13), and a pressure reducing valve (16) and an accumulator (17) are provided on the low-pressure oil circuit (13).

5. A nest-type clamp mechanism according to any one of claims 1 to 4, characterized in that: The cylinder bore has a stepped structure with the inner diameter decreasing from bottom to top, and the cylinder sleeve (3) has a stepped structure with the outer diameter decreasing from bottom to top. Furthermore, an intermediate seal (18) is fitted between the inner wall of the cylinder bore and the outer wall of the cylinder sleeve (3).

6. A nest-type clamp mechanism according to any one of claims 2 to 4, wherein: An upper cover seal (19) is fitted between the outer wall of the mold closing piston rod (4) and the inner wall of the upper cover (6) of the oil cylinder, and a lower cover seal (20) is fitted between the outer wall of the mold closing piston rod (4) and the inner wall of the lower cover (7) of the oil cylinder.

7. A cylinder liner removing tool to be used in combination with the nested mold clamping mechanism according to any one of claims 1 to 6, characterized by: The assembly includes a tooling plate (26), a screw (24), and at least one support rod (21). The tooling plate (26) is detachably connected to the cylinder liner (3) by at least one tooling screw (27). One end of the screw (24) is fixedly connected to the tooling plate (26), and the other end of the screw (24) is slidably fitted with a support plate (22). One end of the support rod (21) is detachably connected to the forming turntable (1), and the other end of the support rod (21) is connected to the support plate (22). Two drive nuts (25) are threaded onto the screw (24), and the two drive nuts (25) are located on both sides of the support plate (22).

8. A matching cylinder liner disassembly and assembly tool according to claim 7, characterized in that: The number of support rods (21) is two, and the two support rods (21) are symmetrically arranged at both ends of the support plate (22).

9. A matching cylinder liner disassembly and assembly tool according to claim 7, characterized in that: The support plate (22) has a first through hole and at least one second through hole. The first through hole is slidably sleeved with the screw (24). The end of the support rod (21) away from the cylinder liner (3) passes through the second through hole and is threadedly connected to a limiting nut (23). The limiting nut (23) abuts against the support plate (22).

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