Annular hot press

Abstract

The invention relates to the technical field of hot presses, in particular to an annular hot press which comprises an annular rack and a plurality of hot pressing mechanisms, and each hot pressing mechanism comprises an upper die structure and a lower die structure; the upper die structure comprises an upper die heat insulation shell, an upper die base, an upper movable die, a first push rod and an upper driving piece in driving connection with the first push rod. The lower die structure comprises a lower die heat insulation shell, a lower die base, a lower movable die and a second push rod, and is fixedly provided with a lower driving part which is in driving connection with the second push rod; the stress rings of the hot pressing mechanisms are independent, and the upper die and the lower die can be synchronously closed and opened, so that the stress of the middle die frame fixing plate is balanced, and the upper die and the lower die are counteracted up and down without bending deformation. And the die frame, the die holder and the movable die can be uniformly stressed, so that the consistency of pressed products is improved. And the inner-layer mold frame adopts all-around heat insulation, so that heat loss can be reduced to the greatest extent, and electric energy is effectively saved.

Description

Technical Field

[0001] The invention relates to the technical field of hot presses, in particular to an annular hot press. Background Art

[0002] The hot press is a professional equipment used in the field of inductor production. During the hot press packaging stage of inductor production, the wound inductor semi-finished product is loaded into the middle template, filled with an appropriate amount of iron powder containing glue, preheated to the activation temperature of the glue, and then put into the hot press. It continues to be heated to the curing temperature of the glue. After a certain period of heat preservation and pressure maintenance, the iron powder, magnetic core and coil are cured into one, thus achieving the purpose of inductor packaging.

[0003] The existing hot press generally adopts a general hydraulic press, which has two lower pressure cylinders arranged on the left and right, equipped with two sets of hot pressing molds, the hot pressing molds have a heating function, and a preheating platform is set in front of the hot pressing molds. The disadvantages of this equipment are as follows: 1. Since it is equipped with two sets of oil cylinders and two sets of molds, the two sets of oil cylinders will affect each other when they move alternately. That is, when one mold is in the state of holding pressure, while the other mold is in the state of opening and closing molds, the deformation state of the press frame and the platen is inconsistent, which has a negative impact on the mold holding pressure next to it. Fig.11 The figure shows the deformation of the hot press with this structure. It can be seen that the side of the mold is bent more, the mold column is stretched longer, and the mold is tilted. This has a significant negative impact on the mold life and product quality.

[0004] 2. Since the compression deformation of the press platen is relatively large and uneven, the size of the mold frame needs to be set relatively large, and the thermal deformation of the mold frame is also large. This not only makes the cost of the mold frame relatively high, but also the product molding effect is not good.

[0005] 3. The mold has an open structure and cannot be insulated, resulting in huge heat loss and excessive power consumption, which affects the production workshop environment. Summary of the invention

[0006] In order to solve the above problems in the background technology, the present invention provides an annular hot press.

[0007] The solution adopted by the present invention to solve the technical problem is: an annular hot press, comprising a hot press body, wherein the hot press body comprises an annular frame and a plurality of hot pressing mechanisms for hot pressing a centering template, The annular frame includes an upper fixing plate, a mold frame fixing platform and a lower fixing plate from top to bottom, a plurality of first installation spaces are formed equidistantly around the central axis between the upper fixing plate and the mold frame fixing platform, and a plurality of second installation spaces are formed equidistantly around the central axis between the mold frame fixing platform and the lower fixing plate; The hot pressing mechanism comprises an upper mold structure located in the first installation space and a lower mold structure located in the second installation space; The upper mold structure includes an upper mold insulation shell, an upper mold base fixed to the inner bottom wall of the upper mold insulation shell, an upper movable mold located above the upper mold base and a first push rod connected to the top of the upper movable mold, and an upper driving member fixedly provided on the upper fixed plate and drivingly connected to the first push rod; The lower mold structure includes a lower mold insulation shell, a lower mold base fixed to the inner top wall of the lower mold insulation shell, a lower movable mold located below the lower mold base and a second push rod connected to the bottom of the lower movable mold, and a lower driving member drivingly connected to the second push rod is fixedly provided under the lower fixed plate; And also includes a control device for driving each of the upper mold structure and the lower mold structure to close and open the mold simultaneously.

[0008] Furthermore, the hot press machine body also has a casing covered outside the annular frame, and the side of the casing has an entrance and exit hole for the middle template to enter and exit the casing. The inside of the casing is also provided with a transfer mechanism located at the center of the annular frame, which is used to move the middle template entering the casing to each of the upper mold structure and the lower mold structure, and to move the middle template that has been hot-pressed out of the casing.

[0009] Furthermore, the transfer mechanism includes a lifting platform, a lifting assembly arranged on the lifting platform, a support plate connected to the lifting assembly, and a first rotary reducer and a second rotary reducer connected to the bottom of the support plate, and a rotatable carrier and a rotatable manipulator are respectively driven and connected below the first rotary reducer and the second rotary reducer.

[0010] Furthermore, the top of the upper movable mold and the bottom of the lower movable mold both have force fulcrums, and the bottom of the first push rod and the top of the second push rod are provided with ball joints connected to the respective force fulcrums.

[0011] Furthermore, it also includes a preheating mechanism arranged beside the hot press body, which is used to preheat the glue material in the middle template to the activation temperature. The preheating mechanism includes an insulating base, a preheating track located on the insulating base, a plurality of heating rods equidistantly inserted on the side of the preheating track, and a first conveying structure located beside the preheating track for driving the middle template to move along the preheating track.

[0012] Furthermore, a temperature measuring element for measuring the temperature on the preheating track is also installed on the side of the preheating track.

[0013] Furthermore, it also includes a cooling mechanism arranged beside the hot press body, the cooling mechanism includes a cooling track, a water-cooled plate arranged on the cooling track, cooling fans evenly and equidistantly arranged above the cooling track, and a second transport structure located beside the cooling track for driving the middle template to move along the cooling track.

[0014] Furthermore, the cooling track is parallel to the preheating track and also includes a transfer mechanism for moving the preheated middle template to the exit and entry doorway, and moving the hot-pressed middle template into the cooling track. The transfer mechanism includes two guide rails perpendicular to the preheating track and the cooling track, a transfer platform slidably mounted on the guide rails, and a drive assembly located below the transfer platform for driving the transfer platform to move along the track.

[0015] Furthermore, the casing is provided with debugging ports at positions corresponding to the heat pressing mechanisms, each debugging port is provided with an insulation door, and the casing is provided with a plurality of opening and closing cylinders for driving and connecting the insulation doors.

[0016] Furthermore, the first push rod and the second push rod have a heat insulation sheet on one side close to the upper driving member and the lower driving member.

[0017] In summary, the beneficial effects of the present invention are as follows: the present invention can effectively improve the working efficiency compared with the traditional hot press by setting a ring frame and equidistantly setting multiple groups of hot pressing mechanisms in the frame. And both include vertically corresponding upper and lower mold structures, wherein the upper mold base and the lower mold base are fixed respectively, and the oil cylinder drives the upper movable mold and the lower movable mold to advance or move away from the mold base through the push rod to realize the hot pressing of the centering template. And a control system is set to synchronously drive the oil cylinder to work, so as to ensure that the upper and lower mold structures move synchronously during the mold closing and mold opening process, avoid bending deformation, ensure uniform force, and thus improve the consistency of the pressed product. And the stress rings of each group of hot pressing mechanisms are independent, and each group does not affect other groups when opening and closing the mold, so that the mold frame fixed plate remains horizontal regardless of whether it is stressed or not, and the mold frame stress point is connected to the push rod by a ball joint, which shields the influence of the deformation of the press cylinder fixed plate on the mold frame. The external housing cooperates with the upper mold insulation shell and the lower mold insulation shell to form a double-layer insulation, which can minimize heat loss, save electricity, and improve the environment of the workshop.

[0018] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following specifically cites a preferred embodiment and describes it in detail with the accompanying drawings as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the overall structure of this embodiment; Figure 2 Schematic diagram of a ring rack in this embodiment; Figure 3 This is a schematic diagram of the main body of the hot press machine of this embodiment; Figure 4 Schematic diagram of the upper mold structure of this embodiment; Figure 5Schematic diagram of the lower mold structure of this embodiment; Figure 6 is a schematic diagram of the transfer mechanism of this embodiment; Figure 7 It is a schematic diagram of the preheating mechanism, cooling mechanism and transfer mechanism of this embodiment; Figure 8 Schematic diagram of the transfer mechanism of this embodiment; Fig. 9 This is a schematic diagram of the hot pressing mechanism of this embodiment when the mold is opened; Fig.10 This is a schematic diagram of the hot pressing mechanism of this embodiment when the mold is closed; Fig.11 A schematic diagram of the prior art described in the background technology of this embodiment; In the figure: 1. hot press machine body; 11. housing; 111. entrance and exit door; 12. annular frame; 121. upper fixing plate; 122. mold frame fixing table; 123. lower fixing plate; 13. first installation space; 14. second installation space; 15. debugging port; 16. heat insulation door; 17. opening and closing cylinder; 2. hot press mechanism; 21. upper mold structure; 211. upper mold heat insulation shell; 212. upper mold seat; 213. upper movable mold; 214. first push rod; 215. upper driving member; 22. lower mold structure; 221. lower mold heat insulation shell; 222. lower mold seat; 223. lower movable mold; 224. second push rod; 225. lower driving member moving parts; 23. ball joints; 24. heat insulation sheets; 3. control devices; 4. transfer mechanisms; 41. lifting platforms; 42. lifting components; 43. support plates; 44. first rotary reducer; 45. second rotary reducer; 46. rotatable carrier; 47. rotatable manipulator; 5. preheating mechanisms; 51. heat insulation base; 52. preheating tracks; 53. heating rods; 54. first transport structure; 55. temperature measuring elements; 6. cooling mechanisms; 61. cooling tracks; 62. water cooling plates; 63. cooling fans; 64. second transport structure; 7. transfer mechanisms; 71. guide rails; 72. transfer platforms; 73. drive components. DETAILED DESCRIPTION

[0020] In order to make the content of the present invention more clearly understood, the present invention is further described below based on specific embodiments in conjunction with the accompanying drawings.

[0021] It should be noted that the terms "center", "upper", "lower", "front", "back", "left", "right", "inner", "outer" and the like used herein to indicate directions or positional relationships are based on directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. Unless otherwise specified, "plurality" means two or more.

[0022] Unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0023] like Figures 1 to 10 As shown, an annular hot press comprises a hot press body 1, wherein the hot press body 1 of this embodiment comprises an annular frame 12 and a plurality of hot pressing mechanisms 2 for hot pressing a center template, the annular frame 12 comprises an upper fixed plate 121, a mold frame fixing platform 122 and a lower fixed plate 123 from top to bottom, a plurality of first installation spaces 13 are formed equidistantly around the central axis between the upper fixed plate 121 and the mold frame fixing platform 122, and a plurality of second installation spaces 14 are formed equidistantly around the central axis between the mold frame fixing platform 122 and the lower fixed plate 123; the hot pressing mechanism 2 comprises an upper mold structure 21 located in the first installation space 13 and a lower mold structure 22 located in the second installation space 14; the upper mold structure 21 comprises an upper mold heat insulation shell 211, a fixed structure An upper mold base 212 on the inner bottom wall of the upper mold insulation shell 211, an upper movable mold 213 located above the upper mold base 212 and a first push rod 214 connected to the top of the upper movable mold 213, and an upper driving component 215 fixedly provided on the upper fixed plate 121 and drivingly connected to the first push rod 214; the lower mold structure 22 includes a lower mold insulation shell 221, a lower mold base 222 fixedly provided on the inner top wall of the lower mold insulation shell 221, a lower movable mold 223 located below the lower mold base 222 and a second push rod 224 connected to the bottom of the lower movable mold 223, and a lower driving component 225 fixedly provided under the lower fixed plate 123 and drivingly connected to the second push rod 224; and also includes a control device 3 for driving each of the upper mold structures 21 and the lower mold structure to close and open the mold simultaneously.

[0024] The ring frame 12 structure of this embodiment includes an upper fixed plate 121, a mold frame fixing platform 122 and a lower fixed plate 123 from top to bottom, and the whole is a regular octagon to form a ring-like structure. A certain gap is left between the upper fixed plate 121 and the mold frame fixing platform 122, and between the mold frame fixing platform 122 and the lower fixed plate 123, so as to form a plurality of evenly distributed first installation spaces 13 and second installation spaces 14 arranged around the central axis of the frame, and these spaces are vertically aligned in the up and down directions. The hot press structure includes seven groups of upper molds and seven groups of lower molds, which are arranged in a ring shape, and the circumference is evenly divided into eight equal parts, one of which is used as the inlet and outlet position of the middle mold plate, and a total of 14 sets of molds are operated simultaneously. Compared with the traditional hot press equipped with only 2 sets of molds, the working efficiency of this model is increased by 7 times. Moreover, this annular hot press has 7 short stress rings, compared with the existing hot presses on the market which only have one large stress ring, and it is an alternating stress ring. The length and span of the stress line are greatly reduced. Under the same pressure conditions, the deformation displacement is greatly reduced.

[0025] Specifically, the upper mold base 212 of the upper mold structure 21 is in a fixed installation state, an upper movable mold 213 is arranged above it, and a cylinder is fixedly arranged on the top of the upper fixed plate 121 as an upper driving member 215, and the top of the upper movable mold 213 is driven and connected by the first push rod 214 to drive it to move toward or away from the upper mold base 212, so as to achieve hot pressing of the middle mold plate placed in the upper mold base 212. Similarly, the lower mold base 222 of the lower mold structure 22 is in a fixed state, a lower movable mold 223 is arranged below it, and a cylinder is fixedly arranged on the bottom of the lower fixed plate 123 as a lower driving member 225, and the top of the lower movable mold 223 is driven and connected by the second push rod 224 to drive it to move toward or away from the lower mold base 222, so as to achieve hot pressing of the middle mold plate placed in the lower mold base 222. A control device 3 including a control cabinet and a hydraulic oil station is connected to the side of the hot press body 1, which can synchronously drive the oil cylinders of each upper mold structure 21 and the lower mold structure 22 to work, so as to drive each hot pressing mechanism 2 to operate simultaneously, and each upper mold structure 21 and the lower mold structure 22 to move synchronously during the mold closing and opening process. It can ensure that the mold frame fixing table 122 in the middle of the frame is balanced and offset up and down, and no bending deformation will occur, so that the mold frame, mold base and movable mold can be evenly stressed, so that the height, density and physical property consistency of the extruded product are greatly improved compared with the previous hot press. Thanks to the excellent stress state of this annular hot press, the mold frame designed to match this annular hot press is relatively small, the length and span of the stress line are greatly reduced, the size and weight of the mold frame are greatly reduced, and the mold frame cost is reduced to about 30% of the previous one. Due to the reduction in size, the thermal deformation of the mold frame is also reduced accordingly. The upper mold structure 21 and the lower mold structure 22 are isolated from each other by a heat-insulating shell formed by six heat-insulating plates outside the mold cavity, which can reduce heat loss during hot pressing.

[0026] like Figure 3As shown, the hot press body 1 of this embodiment also has a casing 11 that is covered outside the annular frame 12, and the side of the casing 11 has an entrance and exit door 111 for the middle template to enter and exit the casing 11. The casing 11 is also provided with a transfer mechanism 4 at the center of the annular frame 12, which is used to move the middle template entering the casing 11 to each upper mold structure 21 and lower mold structure 22, and to move the middle template that has been hot-pressed out of the casing 11. Specifically, the casing 11 is a regular octagon that fits the annular frame 12 as a whole, and is provided with an axially extending inner cavity to accommodate the annular frame 12 and each hot pressing mechanism 2, which can play a protective and heat-insulating role, and cooperates with the above-mentioned upper mold insulation shell 211 and lower mold insulation shell 221 to form a double-layer heat insulation measure, which can minimize heat loss, save electricity, and improve the environment of the workshop. In addition, by designing an entrance and exit door hole 111 on the side of the casing 11, the middle template can be easily entered and exited. The transfer mechanism 4 arranged at the axial position of the ring frame 12 inside the casing 11 can automatically move the middle template between the upper mold structure 21 and the lower mold structure 22 after the middle template enters the casing 11, thereby reducing the need for manual operation and improving the automation level of the hot press.

[0027] like Figure 6 As shown, the transfer mechanism 4 of this embodiment includes a lifting platform 41, a lifting assembly 42 arranged on the lifting platform 41, a support plate 43 connected to the lifting assembly 42, and a first rotary reducer 44 and a second rotary reducer 45 connected to the bottom of the support plate 43, and a rotatable carrier 46 and a rotatable manipulator 47 are respectively driven and connected below the first rotary reducer and the second rotary reducer. Specifically, the lifting platform 41 serves as a basic structure, and a lifting system composed of a servo motor and a screw assembly is used to realize the vertical displacement movement of the support plate 43. The rotatable carrier 46 is driven to rotate by the first rotary reducer 44, and is used to receive and carry the middle template entering the inside of the casing 11 from the entrance. Subsequently, the rotatable manipulator 47 driven by the second rotary reducer 45 grabs the middle template and places it accurately between the upper mold structure 21 and the lower mold structure 22.

[0028] like Figure 4 and Figure 5 As shown, the top of the upper movable mold 213 and the bottom of the lower movable mold 223 of this embodiment both have force fulcrums, and the bottom of the first push rod 214 and the top of the second push rod 224 are provided with ball joints 23 connected to the force fulcrums. The force points of the mold frame are connected by ball joints 23 or ball hinges, shielding the influence of the deformation of the upper and lower fixed plates 123 on the mold frame.

[0029] like Figure 1 and Figure 7As shown, this embodiment also includes a preheating mechanism 5 arranged beside the hot press body 1, which is used to preheat the glue in the middle template to the activation temperature. The preheating mechanism 5 includes an insulating base 51, a preheating track 52 located on the insulating base 51, a plurality of heating rods 53 equidistantly inserted on the side of the preheating track 52, and a first transport structure 54 located beside the preheating track 52 for driving the middle template to move along the preheating track 52. Specifically, the preheating mechanism 5 is an additional device in the hot press, which heats the glue in the middle template to the activation temperature (i.e., the temperature at which the glue can reach the appropriate physical and chemical properties) to ensure that the glue can be effectively activated during the hot pressing process, thereby obtaining the best bonding force or molding effect. The insulating base 51 is made of synthetic stone material, which is intended to effectively isolate heat while supporting other components to prevent heat leakage or impact on other components. The preheating track 52 is a physical track used to accommodate and guide the middle template to move along a specific path to ensure that the middle template can be stably preheated. The heating rods 53 are evenly inserted beside the preheating track 52 to provide continuous heat. Multiple equidistantly arranged heating rods 53 ensure uniform temperature distribution, so that the rubber material is evenly heated during the preheating process. The first transport structure 54 is composed of a manipulator, an electric drive device, rollers, chains and other components, which can drive the middle template to move smoothly along the preheating track 52 to ensure that the rubber material in the middle template is evenly and stably preheated.

[0030] like Figure 7 As shown, the side of the preheating track 52 of this embodiment is also equipped with a temperature measuring element 55 for measuring the temperature on the preheating track 52. Specifically, the temperature measuring element 55 is a thermocouple, which can ensure accurate control of the temperature during the preheating process to avoid overheating or overcooling.

[0031] like Figure 7 As shown, the present embodiment also includes a cooling mechanism 6 arranged beside the hot press body 1, and the cooling mechanism 6 includes a cooling track 61, a water-cooled plate 62 arranged on the cooling track 61, a cooling fan 63 evenly and equidistantly arranged above the cooling track 61, and a second conveying structure 64 located beside the cooling track 61 for driving the middle template to move along the cooling track 61. Specifically, the temperature of the product after the hot pressing is completed is high, and it must be cooled as soon as possible to prevent the material properties from changing or deforming. The cooling track 61 and the upper cover plate constitute a cooling tunnel, and by setting an efficient cooling medium (such as a copper water-cooled plate 62 with high thermal conductivity) on the cooling track 61 and connecting a water cooler, the heat in the product can be quickly taken away, so that the product reaches a suitable temperature in a short time. A heat dissipation fan is equidistantly embedded on the upper cover plate, which can take away the hot air in the cooling tunnel and enhance the cooling effect. The upper cover plate has an opening on the side, and a second conveying structure 64 similar to the first conveying structure 54 is arranged on the side, which can move the middle template along the cooling tunnel.

[0032] like Figure 1 , Figure 7 as well as Figure 8 As shown, the cooling track 61 of this embodiment is parallel to the preheating track 52, and also includes a transfer mechanism 7 for moving the preheated middle template to the exit and entry door 111, and moving the hot-pressed middle template to the cooling track 61. The transfer mechanism 7 includes two guide rails 71 perpendicular to the preheating track 52 and the cooling track 61, a transfer platform 72 slidably mounted on the guide rails 71, and a drive assembly 73 located below the transfer platform 72 for driving the transfer platform 72 to move along the track. Specifically, the preheating track 52 is arranged parallel to the cooling track 61, and the outlet end of the preheating track 52 and the inlet end of the cooling track 61 are both close to the exit and entry door 111 of the hot press. A transfer mechanism 7 is arranged between the two, which is used to transfer the preheated middle template to the hot press, and at the same time transfer the hot-pressed middle template to the cooling track 61. The transfer mechanism 7 includes two guide rails 71 perpendicular to the preheating track 52 and the cooling track 61, and a transfer platform 72 is installed on the guide rails 71. The transfer platform 72 is driven by a driving assembly 73 (composed of a servo motor, a reducer, a connecting rod and a cam follower) connected at the bottom, so that the transfer platform 72 can be smoothly moved from one side of the preheating track 52 to one side of the cooling track 61, thereby achieving smooth transfer of the template.

[0033] like Figure 3 As shown, the casing 11 of this embodiment is provided with a debugging port 15 at the position corresponding to each hot pressing mechanism 2, and each debugging port 15 is provided with an insulating door 16, and the casing 11 is provided with a plurality of opening and closing cylinders 17 driving and connecting each insulating door 16. The insulating door 16 can be provided to debug the hot pressing mold in the machine during the installation process or the repair process.

[0034] like Figure 4 and Figure 5 As shown, the first push rod 214 and the second push rod 224 of this embodiment have a heat insulating sheet 24 on one side close to the upper driving member 215 and the lower driving member 225. Specifically, by providing a heat insulating sheet 24 at the top of the first push rod 214, that is, at one end close to the upper driving member 215, and also providing a heat insulating sheet 24 at the bottom of the second push rod 224, that is, at one end close to the lower driving member 225, it can play a heat insulating role and prevent the heat in the hot pressing mold from being transferred to the driving member.

[0035] The embodiments described above are only preferred implementation modes of the present invention and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and modifications made by those skilled in the art on the basis of the invention shall fall within the protection scope of the present invention.

Claims

1. A ring-shaped hot press, comprising a hot press body, characterized in that: The hot press machine body includes a ring frame and a plurality of hot pressing mechanisms for hot pressing the centering template. The annular frame includes an upper fixing plate, a mold frame fixing platform and a lower fixing plate from top to bottom, a plurality of first installation spaces are formed equidistantly around the central axis between the upper fixing plate and the mold frame fixing platform, and a plurality of second installation spaces are formed equidistantly around the central axis between the mold frame fixing platform and the lower fixing plate; The hot pressing mechanism comprises an upper mold structure located in the first installation space and a lower mold structure located in the second installation space; The upper mold structure includes an upper mold insulation shell, an upper mold base fixed to the inner bottom wall of the upper mold insulation shell, an upper movable mold located above the upper mold base and a first push rod connected to the top of the upper movable mold, and an upper driving member fixedly provided on the upper fixed plate and drivingly connected to the first push rod; The lower mold structure includes a lower mold insulation shell, a lower mold base fixed to the inner top wall of the lower mold insulation shell, a lower movable mold located below the lower mold base and a second push rod connected to the bottom of the lower movable mold, and a lower driving member drivingly connected to the second push rod is fixedly provided under the lower fixed plate; And also includes a control device for driving each of the upper mold structure and the lower mold structure to close and open the mold simultaneously.

2. The annular hot press according to claim 1, characterized in that: The hot press machine body also has a casing covered outside the annular frame, and the side of the casing has an entrance and exit hole for the middle template to enter and exit the casing. The casing is also provided with a transfer mechanism at the center of the annular frame, which is used to move the middle template entering the casing to each of the upper mold structure and the lower mold structure, and to move the middle template that has been hot-pressed out of the casing.

3. The annular hot press according to claim 2, characterized in that: The transfer mechanism includes a lifting platform, a lifting assembly arranged on the lifting platform, a support plate connected to the lifting assembly, and a first rotary reducer and a second rotary reducer connected to the bottom of the support plate, and a rotatable carrier and a rotatable manipulator are respectively driven and connected below the first rotary reducer and the second rotary reducer.

4. The annular hot press according to claim 1, characterized in that: The top of the upper movable mold and the bottom of the lower movable mold both have force fulcrums, and the bottom of the first push rod and the top of the second push rod are provided with ball joints connected to the respective force fulcrums.

5. The annular hot press according to claim 2, characterized in that: It also includes a preheating mechanism arranged beside the hot press body, which is used to preheat the glue in the middle template to the activation temperature. The preheating mechanism includes an insulating base, a preheating track located on the insulating base, a plurality of heating rods equidistantly inserted on the side of the preheating track, and a first transport structure located beside the preheating track for driving the middle template to move along the preheating track.

6. The annular hot press according to claim 5, characterized in that: A temperature measuring element for measuring the temperature on the preheating track is also installed on the side of the preheating track.

7. The annular hot press according to claim 5, characterized in that: The invention also includes a cooling mechanism arranged beside the main body of the hot press, wherein the cooling mechanism includes a cooling track, a water-cooling plate arranged on the cooling track, cooling fans evenly and equidistantly arranged above the cooling track, and a second transport structure located beside the cooling track for driving the middle template to move along the cooling track.

8. The annular hot press according to claim 7, characterized in that: The cooling track is parallel to the preheating track and also includes a transfer mechanism for moving the preheated middle template to the access doorway and moving the hot-pressed middle template into the cooling track. The transfer mechanism includes two guide rails perpendicular to the preheating track and the cooling track, a transfer platform slidably mounted on the guide rails, and a drive assembly located below the transfer platform for driving the transfer platform to move along the track.

9. The annular hot press according to claim 2, characterized in that: The casing is provided with debugging ports at positions corresponding to the heat pressing mechanisms, each debugging port is provided with an insulation door, and the casing is provided with a plurality of opening and closing cylinders driving and connecting the insulation doors.

10. The annular hot press according to claim 1, characterized in that: The first push rod and the second push rod have a heat insulation sheet on one side close to the upper driving member and the lower driving member.

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