A ring hot press

Abstract

The present invention relates to the technical field of hot presses, and particularly to an annular hot press, which includes an annular frame and a plurality of hot pressing mechanisms. The hot pressing mechanism includes an upper die structure and a lower die structure. The upper die structure includes an upper die heat insulation shell, an upper die seat, an upper moving die and a first push rod, and an upper driving member is provided which is drivingly connected to the first push rod. The lower die structure includes a lower die heat insulation shell, a lower die seat, a lower moving die and a second push rod, and a lower driving member is fixedly provided which is drivingly connected to the second push rod. In the present invention, the stress rings of each group of hot pressing mechanisms are independent, and the upper die and the lower die structures can be closed and opened synchronously, so that the middle die frame fixing plate is stressed evenly and the up and down forces cancel each other out without bending deformation. Moreover, the die frame, the die seat and the moving die can all be stressed evenly, thereby improving the consistency of the pressed products. And the inner layer die frame adopts full-circumference heat insulation, which can minimize heat dissipation to effectively save electric energy.

Description

Technical Field

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

[0002] A hot press is a professional equipment applied in the field of inductor production. In the hot pressing and encapsulation stage of inductor production, the wound inductor semi-finished product is loaded into the middle template, an appropriate amount of glue-containing iron powder is filled, preheated to the activation temperature of the glue material, and then enters the hot press. It is further heated to the curing temperature of the glue material, and after maintaining the temperature and pressure for a certain period of time, the iron powder, magnetic core and coil are cured into one body to achieve the purpose of inductor encapsulation.

[0003] Existing hot presses generally use general hydraulic presses. Such a hydraulic press has two downward pressing cylinders arranged left and right, equipped with two sets of hot pressing dies. The hot pressing dies have a heating function, and a preheating platform is arranged in front of the hot pressing dies. The disadvantages of this equipment are as follows:

[0004] 1. Since it is equipped with two sets of oil cylinders and two sets of dies, the two sets of oil cylinders will affect each other when they move alternately. That is, when one set of dies is in the pressure-holding state and the other set of dies is opening and closing the mold, the deformation states of the press frame and the platen are inconsistent, which has a negative impact on the adjacent pressure-holding die. Figure 11 The figure shows a schematic diagram of the deformation of a hot press with this structure. It can be seen that the side where the mold is closed has a large bending, the mold closing column is stretched longer, and the mold is inclined. This has a greater negative impact on the mold life and the product quality.

[0005] 2. Since the deformation amount of the press platen under pressure is relatively large and uneven, the size of the mold base needs to be set relatively large, and the thermal deformation of the mold base is also large. This not only increases the cost of the mold base, but also results in poor product forming effect.

[0006] 3. The die has an open structure and cannot keep warm, resulting in huge heat loss, excessive power consumption, and affecting the production workshop environment. Summary of the Invention

[0007] In order to solve the problems in the above background art, the present invention provides an annular hot press.

[0008] The solution adopted by the present invention to solve its technical problems is: an annular hot press, including a hot press main body, the hot press main body includes an annular frame and a plurality of hot pressing mechanisms for hot pressing the middle template.

[0009] The annular frame sequentially includes an upper fixing plate, a mold base fixing table 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 base fixing table, and a plurality of second installation spaces are formed equidistantly around the central axis between the mold base fixing table and the lower fixing plate;

[0010] The hot pressing mechanism includes an upper die structure located in the first installation space and a lower die structure located in the second installation space;

[0011] The upper die structure includes an upper die heat insulation shell, an upper die base fixedly arranged on the inner bottom wall of the upper die heat insulation shell, an upper moving die located above the upper die base, a first push rod connected to the top of the upper moving die, and an upper driving member fixedly arranged on the upper fixing plate and drivingly connected to the first push rod;

[0012] The lower die structure includes a lower die heat insulation shell, a lower die base fixedly arranged on the inner top wall of the lower die heat insulation shell, a lower moving die located below the lower die base, a second push rod connected to the bottom of the lower moving die, and a lower driving member fixedly arranged under the lower fixing plate and drivingly connected to the second push rod;

[0013] And it further includes a control device for driving each of the upper die structures and the lower die structures to close and open the die simultaneously.

[0014] Furthermore, the hot press main body further has a machine shell covering the outer side of the annular frame. The side of the machine shell has an access door opening for the middle template to enter and exit the machine shell. Inside the machine shell, a transfer mechanism is further arranged at the central position of the annular frame for moving the middle template entering the machine shell into each of the upper die structures and the lower die structures, and moving the middle template after hot pressing out of the machine shell.

[0015] Furthermore, the transfer mechanism includes a lifting platform, a lifting component arranged on the lifting platform, a support plate connected to the lifting component, and a first rotary reducer and a second rotary reducer connected to the bottom of the support plate. A rotatable carrier and a rotatable manipulator are respectively drivingly connected below the first rotary reducer and the second rotary reducer.

[0016] Furthermore, both the top of the upper moving die and the bottom of the lower moving die have force bearing points, and spherical joints connected to each of the force bearing points are arranged at the bottom of the first push rod and the top of the second push rod.

[0017] Furthermore, a preheating mechanism is further arranged beside the hot press main body for preheating the adhesive material in the middle template to the activation temperature. The preheating mechanism includes a heat insulation base, a preheating track located on the heat insulation base, a plurality of heating rods inserted at equal intervals on the side of the preheating track, and a first handling structure located beside the preheating track for driving the middle template to move along the preheating track.

[0018] Furthermore, a temperature measuring element for measuring the temperature on the preheating track is further installed on the side of the preheating track.

[0019] 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.

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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

[0025] Figure 1 Schematic diagram of the overall structure of this embodiment;

[0026] Figure 2 Schematic diagram of a ring rack in this embodiment;

[0027] Figure 3 This is a schematic diagram of the main body of the hot press machine of this embodiment;

[0028] Figure 4 Schematic diagram of the upper mold structure of this embodiment;

[0029] Figure 5 Schematic diagram of the lower mold structure of this embodiment;

[0030] Figure 6 Schematic diagram of the transfer mechanism of this embodiment;

[0031] Figure 7 It is a schematic diagram of the preheating mechanism, cooling mechanism and transfer mechanism of this embodiment;

[0032] Figure 8 Schematic diagram of the transfer mechanism of this embodiment;

[0033] Figure 9 This is a schematic diagram of the hot pressing mechanism of this embodiment when the mold is opened;

[0034] Figure 10 This is a schematic diagram of the hot pressing mechanism of this embodiment when the mold is closed;

[0035] Figure 11 A schematic diagram of the prior art described in the background technology of this embodiment;

[0036] 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

[0037] In order to make the content of the present invention easier to be clearly understood, the following further describes the present invention according to specific embodiments in conjunction with the accompanying drawings.

[0038] It should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc. used herein is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. Unless otherwise specified, the meaning of "plurality" is two or more.

[0039] Unless otherwise clearly specified and defined, the terms "mounted", "connected", and "coupled" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific circumstances.

[0040] As Figures 1 to 10 shown, a ring hot press includes a hot press main body 1. The hot press main body 1 in this embodiment includes a ring frame 12 and a plurality of hot pressing mechanisms 2 for hot pressing the middle template. The ring frame 12 includes an upper fixing plate 121, a mold frame fixing table 122, and a lower fixing plate 123 in sequence from top to bottom. A plurality of first installation spaces 13 are formed equidistantly around the central axis between the upper fixing plate 121 and the mold frame fixing table 122, and a plurality of second installation spaces 14 are formed equidistantly around the central axis between the mold frame fixing table 122 and the lower fixing plate 123; the hot pressing mechanism 2 includes 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 includes an upper mold heat insulation shell 211, an upper mold base 212 fixed to the inner bottom wall of the upper mold heat insulation shell 211, an upper moving mold 213 located above the upper mold base 212, and a first push rod 214 connecting the top of the upper moving mold 213, and an upper driving member 215 is fixed on the upper fixing plate 121 and is drivingly connected to the first push rod 214; the lower mold structure 22 includes a lower mold heat insulation shell 221, a lower mold base 222 fixed to the inner top wall of the lower mold heat insulation shell 221, a lower moving mold 223 located below the lower mold base 222, and a second push rod 224 connecting the bottom of the lower moving mold 223, and a lower driving member 225 is fixed under the lower fixing plate 123 and is drivingly connected to the second push rod 224; and further includes a control device 3 for driving each of the upper mold structures 21 and the lower mold structures to close and open the mold simultaneously.

[0041] The structure of the annular frame 12 in this embodiment sequentially includes an upper fixing plate 121, a die holder fixing table 122, and a lower fixing plate 123 from top to bottom, and is in the shape of a regular octagon as a whole to form a quasi-annular structure. There are certain gaps between the upper fixing plate 121 and the die holder fixing table 122, and between the die holder fixing table 122 and the lower fixing plate 123, so as to form a plurality of equally spaced 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. This hot press structure includes seven sets of upper dies and seven sets of lower dies, which are arranged in an annular layout, and the circumference is evenly divided into eight equal parts, with one equal part as the inlet and outlet position of the middle template, and a total of 14 sets of dies operate simultaneously. Compared with the traditional hot press equipped with only 2 sets of dies, the working efficiency of this model is increased by 7 times. And this annular hot press has 7 short stress rings. Compared with the existing hot press on the market with only one large stress ring, and it is an alternating stress ring, the length and span of the stress lines are greatly reduced, and under the same pressure conditions, the deformation displacement is greatly reduced.

[0042] Specifically, for the upper die structure 21, its upper die base 212 is fixedly installed, an upper moving die 213 is arranged above it, and an oil cylinder is fixedly installed on the top of the upper fixing plate 121 as the upper driving member 215. The upper moving die 213 is driven and connected to the top of the upper moving die 213 through the first push rod 214, and is driven to push towards or away from the upper die base 212 to realize hot pressing of the middle template placed in the upper die base 212. Similarly, for the lower die structure 22, its lower die base 222 is fixed, a lower moving die 223 is arranged below it, and an oil cylinder is fixedly installed at the bottom of the lower fixing plate 123 as the lower driving member 225. The lower moving die 223 is driven and connected to the top of the lower moving die 223 through the second push rod 224, and is driven to push towards or away from the lower die base 222 to realize hot pressing of the middle template placed in the lower die base 222. And a control device 3 including a control cabinet and a hydraulic oil station is connected beside the hot press main body 1, which can synchronously drive the oil cylinders of each upper die structure 21 and lower die structure 22 to work, so as to drive each hot pressing mechanism 2 to operate simultaneously, and each upper die structure 21 and lower die structure 22 move synchronously during the mold closing and mold opening processes. It can ensure that the die holder fixing table 122 in the middle of the frame is balanced in force and cancels each other up and down, and no bending deformation will occur. Furthermore, the die holder, die base, and moving die can all be evenly stressed, so that the consistency of the height, density, and physical properties of the pressed products is greatly improved compared with the previous hot press. Due to the excellent stress state of this annular hot press, the die holder designed to match this annular hot press is relatively small, the length and span of the stress lines are greatly reduced, the size and weight of the die holder are greatly reduced, the die holder cost is reduced to about 30% of the previous one, and due to the reduction in size, the thermal deformation of the die holder is also correspondingly reduced. And an insulating shell composed of six insulating plates is used to isolate outside the die cavities of the upper die structure 21 and the lower die structure 22, which can reduce heat loss during hot pressing.

[0043] As Figure 3As shown in the figure, the hot press main body 1 of this embodiment further has a casing 11 covering the outside of the annular frame 12. There is an access opening 111 on the side of the casing 11 for the middle template to enter and exit the inside of the casing 11. Inside the casing 11, a transfer mechanism 4 is also provided at the central position of the annular frame 12, which is used to move the middle template entering the inside of the casing 11 into each upper die structure 21 and lower die structure 22, and move the middle template after hot pressing out of the casing 11. Specifically, the casing 11 is integrally in the shape of a regular octagon adapted to the annular frame 12, and an axially extending inner cavity is provided inside to accommodate the annular frame 12 and each hot pressing mechanism 2, which can play a role in protection and heat insulation. Cooperating with the above-mentioned upper die heat insulation shell 211 and lower die heat insulation shell 221, it constitutes a double-layer heat insulation measure, which can minimize heat loss, save electric energy, and improve the workshop environment. And by designing the access opening 111 on the side of the casing 11, the middle template can enter and exit conveniently. The transfer mechanism 4 provided at the axis position of the annular frame 12 inside the casing 11 can automatically move the middle template between each upper die structure 21 and lower die structure 22 after the middle template enters the casing 11, reducing the need for manual operation and improving the automation level of the hot press.

[0044] As Figure 6 shown, the transfer mechanism 4 of this embodiment includes a lifting platform 41, a lifting component 42 provided on the lifting platform 41, a support plate 43 connected to the lifting component 42, and a first rotary reducer 44 and a second rotary reducer 45 connected to the bottom of the support plate 43. 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 the basic structure, and through a lifting system composed of a servo motor and a lead screw assembly, the vertical displacement movement of the support plate 43 is realized. The rotatable carrier 46 is driven by the first rotary reducer 44 to rotate, and is used to receive and carry the middle template entering the inside of the casing 11 from the entrance and exit. Subsequently, the rotatable manipulator 47 driven by the second rotary reducer 45 grabs the middle template and accurately places it between the upper die structure 21 and the lower die structure 22.

[0045] As Figure 4 and Figure 5 shown, both the top of the upper moving die 213 and the bottom of the lower moving die 223 of this embodiment have force fulcrums, and spherical joints 23 connected to each force fulcrum are provided at the bottom of the first push rod 214 and the top of the second push rod 224. The force application points of the die set are connected by spherical joints 23 or spherical hinges, shielding the influence of the deformation of the upper and lower fixing plates 123 on the die set.

[0046] As Figure 1 and Figure 7As shown in the figure, this embodiment further includes a preheating mechanism 5 disposed beside the hot press main body 1, which is used to preheat the adhesive material in the middle template to the activation temperature. The preheating mechanism 5 includes a heat-insulating base 51, a preheating track 52 located on the heat-insulating base 51, a plurality of heating rods 53 inserted equidistantly on the side of the preheating track 52, and a first handling 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. By heating the adhesive material in the middle template to the activation temperature (i.e., the temperature at which the adhesive material can achieve appropriate physical and chemical properties), it ensures that the adhesive material can be effectively activated during the hot pressing process, thereby obtaining the best bonding force or forming effect. The heat-insulating base 51 is made of synthetic stone material, which is designed to support other components while effectively isolating heat to prevent heat leakage or affecting other components. The preheating track 52 serves as a physical track for accommodating and guiding the middle template to move along a specific path, ensuring that the middle template can be stably preheated. The heating rods 53 are evenly inserted beside the preheating track 52 to provide continuous heat. The plurality of heating rods 53 arranged equidistantly ensure uniform temperature distribution, so that the adhesive material is evenly heated during the preheating process. The first handling structure 54 is composed of components such as a manipulator, an electric drive device, rollers, and chains, and can drive the middle template to move smoothly along the preheating track 52, ensuring that the adhesive material in the middle template is uniformly and stably preheated.

[0047] As Figure 7 shown, a temperature measuring element 55 for measuring the temperature on the preheating track 52 is also installed on the side of the preheating track 52 of this embodiment. Specifically, the temperature measuring element 55 is a thermocouple, which can ensure precise control of the temperature during the preheating process to avoid overheating or overcooling.

[0048] As Figure 7 shown, this embodiment further includes a cooling mechanism 6 disposed beside the hot press main body 1. The cooling mechanism 6 includes a cooling track 61, a water-cooled plate 62 disposed on the cooling track 61, cooling fans 63 evenly and equidistantly disposed above the cooling track 61, and a second handling 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 hot pressing is relatively high, and it must be cooled as soon as possible to prevent changes in material properties or deformation. The cooling track 61 and the upper cover plate form a cooling tunnel. 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 it to a water chiller, the heat in the product can be quickly removed, enabling the product to reach an appropriate temperature in a short time. And heat dissipation fans are evenly embedded on the upper cover plate, which can take away the hot air in the cooling tunnel and enhance the cooling effect. And the side of the upper cover plate is open, and a second handling structure 64 similar to the first handling structure 54 is disposed beside it, which can make the middle template move along the cooling tunnel.

[0049] AsFigure 1 , Figure 7 and Figure 8 As shown, the cooling track 61 of this embodiment is parallel to the preheating track 52, and further includes a transfer mechanism 7 for moving the preheated middle template to the access opening 111, and moving the middle template after hot pressing into 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 driving assembly 73 located below the transfer platform 72 for driving the transfer platform 72 to move along the track. Specifically, the preheating track 52 and the cooling track 61 are arranged in parallel, and the outlet end of the preheating track 52 and the inlet end of the cooling track 61 are both close to the access opening 111 of the hot press. A transfer mechanism 7 is provided therebetween for transferring the preheated middle template into the hot press, and at the same time transferring the middle template after hot pressing onto 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 mounted 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 to the bottom, so that the transfer platform 72 can move smoothly from one side of the preheating track 52 to one side of the cooling track 61, realizing the smooth transfer of the template.

[0050] As Figure 3 shown, debugging openings 15 are provided at the positions of the machine housing 11 corresponding to the respective hot pressing mechanisms 2 of this embodiment. Heat insulation doors 16 are provided at each debugging opening 15, and a plurality of opening and closing cylinders 17 for drivingly connecting the respective heat insulation doors 16 are provided inside the machine housing 11. The provision of the heat insulation doors 16 enables the debugging of the hot pressing dies inside the machine during the installation process or the repair process.

[0051] As Figure 4 and Figure 5 shown, heat insulation sheets 24 are provided on one side of the first push rod 214 and the second push rod 224 close to the upper driving member 215 and the lower driving member 225. Specifically, by providing heat insulation sheets 24 at the top of the first push rod 214, that is, at one end close to the upper driving member 215, and at the bottom of the second push rod 224, that is, at one end close to the lower driving member 225, heat insulation can be achieved to prevent the heat in the hot pressing die from being conducted to the driving member.

[0052] The above-described embodiments are only the preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby. Any non-substantial changes and modifications made by those skilled in the art based on the present 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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