Hot pressing device and uninterrupted forming device with same

Abstract

The utility model provides a hot-pressing device and an uninterrupted forming device with the hot-pressing device, the hot-pressing device is used for pressing materials, and the hot-pressing device comprises a lower die, an upper die and a lower die, the upper mold is arranged above the lower mold, the upper mold comprises an upper mold plate, a first transition surface is arranged between the lower surface of the upper mold plate and the end face of the front side of the upper mold plate, and the distance between the first transition surface and the lower mold plate is gradually reduced from front to back. By the adoption of the technical scheme, the problem that in the prior art, deep indentations can be generated when materials are hot-pressed through a hot-pressing device can be effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of processing equipment, and more specifically, to a hot pressing device and a continuous forming device having the same. Background Technology

[0002] With the widespread application of composite materials in aerospace, automobile manufacturing, construction and sporting goods, hot pressing equipment, as a key piece of equipment for composite material molding and processing, has a crucial impact on product quality and production costs in terms of performance and efficiency.

[0003] Traditional hot press equipment uses high temperature and high pressure conditions to cure resin and form the desired composite material parts. These devices typically consist of fixed upper and lower molds, where the material undergoes a solid-state transformation through pressing between the molds, thereby achieving the desired shape and properties.

[0004] However, existing technologies face several pressing problems in the continuous molding process of composite materials. Because composite materials require significant pressure, continuous pressure is insufficient; intermittent pressing is necessary. This involves applying pressure briefly, holding it for a period, then lifting it, allowing the discharge mechanism to pull out a section, and then pressing down again. This process results in multiple intermittent indentations on the finished material. These indentations not only affect the appearance of the finished product but, more importantly, create stress concentrations within the material. These stress concentrations accumulate during multiple molding or processing steps, ultimately impacting the mechanical properties of the composite material. Utility Model Content

[0005] The main objective of this invention is to provide a hot pressing device and a continuous forming device having the same, so as to solve the problem that the hot pressing device in the prior art will produce deep indentations when hot pressing materials.

[0006] To achieve the above objectives, according to one aspect of the present invention, a hot pressing device is provided for pressing materials, comprising: a lower mold including a lower mold plate; an upper mold disposed above the lower mold, the upper mold including an upper mold plate, a first transition surface being provided between the lower surface of the upper mold plate and the front end face of the upper mold plate, the distance between the first transition surface and the lower mold plate gradually decreasing from front to back.

[0007] In one embodiment, the bottom corner of the front end of the upper mold plate is rounded, and the surface of the rounded corner forms a first transition surface.

[0008] In one embodiment, the lower surface of the upper mold plate includes a main molding surface and a first inclined surface located in front of the main molding surface in the direction of material movement. The first inclined surface gradually slopes downward from front to back, and a first transition surface connects with the front end of the first inclined surface.

[0009] In one embodiment, the upper mold plate has a first position for pressing the main molding surface against the working surface of the lower mold plate, a second position for pressing the first inclined surface against the working surface of the lower mold plate, and a non-working position away from the working surface of the lower mold plate; the hot pressing device further includes: a driving device, which cooperates with the upper mold drive to drive the upper mold plate to rotate, so that the upper mold plate switches between the first position and the second position, and the driving device can also drive the upper mold plate to move, so that the upper mold plate moves to the non-working position.

[0010] In one embodiment, the first inclined surface is a plane, and a second transition surface is provided between the main molding surface and the first inclined surface. The upper mold plate also includes an intermediate transition position located between the first position and the second position. When the upper mold plate is located in the transition position, the second transition surface is pressed against the working surface of the lower mold plate.

[0011] In one embodiment, the inclination angle of the first inclined surface is between 3° and 5°, and the length of the first inclined surface is not less than 3% of the length of the upper mold plate.

[0012] In one embodiment, the upper mold plate includes a plurality of independently arranged hot press plate units arranged front to back, with a first transition surface located on the front hot press plate unit.

[0013] In one embodiment, the bottom corner of the front end of the upper mold plate is rounded, and the surface of the rounded corner forms a first transition surface. The ratio between the radius of the rounded corner and the length of the hot press plate unit to which it is located is between 2% and 5%.

[0014] According to another aspect of the present invention, an uninterrupted forming apparatus is provided, comprising: a feeding device; a hot pressing device disposed on the rear side of the feeding device for hot pressing the material fed out by the feeding device to form a finished material, the hot pressing device being the aforementioned hot pressing device; a traction device disposed on the rear side of the hot pressing device for traction of the finished material; and a control device, wherein the hot pressing device and the traction device are electrically connected to the control device.

[0015] In one embodiment, when the upper mold plate of the hot pressing device includes multiple hot pressing plate units, the control device controls the temperature of the hot pressing plate unit located in the middle to be higher than the temperature of the hot pressing plate units located on both sides.

[0016] By applying the technical solution of this utility model, a first transition surface is provided between the lower surface of the upper mold plate and the front end face of the upper mold plate. The distance between the first transition surface and the lower mold plate gradually decreases from front to back. The above structure eliminates the abrupt, right-angled mold surface. The transition mode at the mold interface allows the material pressed by the edge of the upper mold plate to move inwards towards the mold. The ambient temperature of the material corresponding to the first transition surface is between room temperature and the heating temperature of the upper mold, further reducing the impact of temperature difference and mitigating the indentation problem.

[0017] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0018] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments and descriptions of this utility model are used to explain this utility model and do not constitute an undue limitation thereof. In the drawings:

[0019] Figure 1 A three-dimensional structural schematic diagram of an embodiment of the hot pressing device according to the present invention is shown;

[0020] Figure 2 It shows Figure 1 An enlarged structural diagram of point A of the hot pressing device;

[0021] Figure 3 It shows Figure 1 A top view of the hot pressing device;

[0022] Figure 4 It shows Figure 3 A cross-sectional view of the hot pressing device along the AA direction;

[0023] Figure 5 It shows Figure 3 A cross-sectional view of the hot pressing device along the BB direction;

[0024] Figure 6 It shows Figure 5 An enlarged structural diagram of point B of the hot pressing device;

[0025] Figure 7 It shows Figure 3 A cross-sectional view of the hot pressing device along the CC direction;

[0026] Figure 8 It shows Figure 1 A schematic diagram of a portion of the structure of the hot press device when the upper mold plate is in the second position;

[0027] Figure 9 It shows Figure 1 A cross-sectional schematic diagram of a portion of the upper mold plate of the hot pressing device;

[0028] Figure 10 It shows Figure 1 A three-dimensional structural diagram of a portion of the hot press plate unit of a hot press device;

[0029] Figure 11 It shows Figure 10 A side view of the hot press plate unit; and

[0030] Figure 12 A schematic diagram of the uninterrupted molding apparatus according to the present invention is shown.

[0031] The above figures include the following reference numerals:

[0032] 10. Lower mold; 11. Lower mold plate; 20. Upper mold; 21. Upper mold plate; 211. Main mold pressing surface; 212. First inclined surface; 213. Second transition surface; 214. Mounting component; 217. Hot press plate unit; 218. First transition surface; 219. Hinge component; 2191. Upper hinge point; 2192. Lower hinge point; 30. Drive device; 31. Drive component; 311. Push rod; 40. Base; 41. Guide shaft; 50. Bellows cover; 120. Feeding device; 140. Hot press device; 150. Traction device. Detailed Implementation

[0033] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0034] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention 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 invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0035] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate for the embodiments of the utility model described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0036] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0037] To address the issue of indentation during continuous molding of composite materials, the inventors conducted detailed analysis and experiments. They concluded that indentation not only affects product appearance but can also lead to stress concentration, especially during secondary or multiple molding processes, where the negative impact on material mechanical properties intensifies with each molding cycle. Initial analysis suggested that indentation originates from gaps at the mold joints. However, after multiple precise adjustments to the mold gaps, it was found that even with excellent mold sealing, indentation could not be completely avoided. In a chance observation, the inventors discovered that material initially positioned within the entire mold line did not exhibit indentation, thus establishing the need for structural improvements at the mold port. Subsequently, attention shifted to the temperature difference effect during material entry into the mold port, and experiments demonstrated that appropriate temperature control effectively alleviated indentation. Based on this, the inventors made appropriate modifications to the upper mold 20 structure to mitigate the problem of deep indentations.

[0038] Specifically, such as Figures 1 to 3 , Figures 8 to 11 As shown, the hot pressing device of this embodiment presses materials together. The hot pressing device includes a lower mold 10 and an upper mold 20. The lower mold 10 includes a lower mold plate 11. The upper mold 20 is disposed above the lower mold 10 and includes an upper mold plate 21. A first transition surface 218 is provided between the lower surface of the upper mold plate 21 and the front end face of the upper mold plate 21. The distance between the first transition surface 218 and the lower mold plate 11 gradually decreases from front to back.

[0039] Applying the technical solution of this embodiment, a first transition surface 218 is provided between the lower surface of the upper mold plate 21 and the front end face of the upper mold plate 21. The distance between the first transition surface 218 and the lower mold plate 11 gradually decreases from front to back. The above structure eliminates the abrupt, right-angled mold surface. The transition mode at the mold interface allows the material pressed by the edge of the upper mold plate 21 to move inwards towards the mold. The ambient temperature of the material corresponding to the first transition surface 218 is between room temperature and the heating temperature of the upper mold 20, further reducing the impact of temperature difference and further alleviating the indentation problem.

[0040] like Figure 1 , Figure 2 , Figures 8 to 11 As shown, in this embodiment, the bottom corner of the front end of the upper mold plate 21 is rounded, and the surface of the rounded corner forms a first transition surface 218. Specifically, the gradual distance design between the arc-shaped first transition surface 218 and the lower mold plate 11 forms a smooth transition area from room temperature to the mold heating temperature. The existence of this temperature gradient can significantly reduce the temperature difference impact when the material enters the mold, thereby mitigating the instability of material properties and the formation of indentations that may be caused by sudden temperature changes.

[0041] like Figure 1 , Figure 2 , Figure 5 , Figures 8 to 11 As shown, in this embodiment, the lower surface of the upper mold plate 21 includes a main molding surface 211 and a first inclined surface 212 located in front of the main molding surface 211 in the material movement direction. The first inclined surface 212 gradually slopes downward from front to back, and the first transition surface 218 connects with the front end of the first inclined surface 212. The mold ends are rounded, and the middle part adopts a long slope progressive slope, which further reduces the temperature difference impact when the material enters the mold, thereby further alleviating the indentation problem.

[0042] like Figures 1 to 11 As shown, in this embodiment, the upper mold plate 21 has a first position where the main molding surface 211 is pressed against the working surface of the lower mold plate 11, a second position where the first inclined surface 212 is pressed against the working surface of the lower mold plate 11, and a non-working position away from the working surface of the lower mold plate 11 (not shown in the figure); the hot pressing device further includes: a driving device 30, which drives the upper mold 20 to drive the upper mold plate 21 to rotate, so that the upper mold plate 21 switches between the first position and the second position. The driving device 30 can also drive the upper mold plate 21 to move, so that the upper mold plate 21 moves to the non-working position.

[0043] It should be noted that the first and second positions of the upper mold plate 21 are actually working positions where materials can be processed. That is to say, the drive device 30 not only enables the upper mold plate 21 to switch between working and non-working positions, but also enables it to switch between different working positions.

[0044] Applying the technical solution of this embodiment, after the material enters the mold, the driving device 30 first drives the upper mold plate 21 to move to the first position and keeps the upper mold plate 21 stationary for a predetermined time. At this time, a slight indentation may appear on the material at the position corresponding to the front edge of the main molding surface 211. Then, the driving device 30 drives the upper mold plate 21 to rotate to the second position. During the rotation, the upper mold plate 21 gradually applies pressure to the indented portion to remove the indentation. When the upper mold plate 21 rotates to the second position, the part of the material that was not pressed on the front side will be pressed between the first inclined surface 212 and the working surface of the lower mold plate 11, thereby pressing this part of the material. After the processing is completed, the driving device 30 can drive the upper mold plate 21 to move to the non-working position, and then pull the material backward. This cycle continues to generate a finished material without indentations. In other words, in this embodiment, by setting the surface of the upper mold plate 21 as the main molding surface 211 and the first inclined surface 212, the intention is to move the part of the material with indentations toward the inside of the mold. Then, the upper mold plate 21 gradually rolls the material by pressing down at the end, ensuring the uniform distribution of pressure, removing the indentations, and solving the problem of multiple indentations appearing on the finished material in the prior art. This results in a smooth product appearance and ensures the performance of the finished composite material.

[0045] In other words, the core of this embodiment lies in achieving a non-marking, uninterrupted molding effect through the combination of the first inclined surface 212 of the upper mold plate 21 and the main molding surface 211, as well as the precise control of the driving device, which significantly improves the appearance and performance of composite material products. This embodiment essentially introduces a novel dynamic pressure distribution mechanism for the material entry and pressing process. When the material first enters the mold, the driving device 30 first drives the upper mold plate 21 to the first position, allowing the material to contact the main molding surface 211. At this time, due to the instantaneous increase in pressure, a slight mark may be generated on the front edge of the material in contact with the main molding surface. However, unlike the static pressure maintenance in the prior art, the highlight of this embodiment is that the driving device 30 then drives the upper mold plate 21 to rotate to the second position, that is, the first inclined surface 212 contacts the working surface of the lower mold plate 11. This action is like pressing a seesaw; as the upper mold plate 21 rotates, a gradual pressure is applied to the marked portion, thereby effectively removing the mark. The unpressed portion of the material at the front is pressed between the first inclined surface and the lower mold plate, achieving uniform compression and curing of the material. Once the pressing process is complete, the upper mold plate 21 is driven to a non-working position, and then the material is pulled to start the next cycle.

[0046] It should be noted that the first inclined surface 212 has a relatively short pressing time for the material, and its main function is to eliminate indentations. The final pressing of the material is still achieved by the main mold pressing surface 211 on the rear side.

[0047] Preferably, in this embodiment, after the upper mold plate 21 rotates to the second position for the first time, the upper mold plate 21 can return from the second position to the first position, and then return to the second position, and perform repeated rolling multiple times, thereby further ensuring that the indentation is eliminated.

[0048] like Figures 1 to 6 As shown, in this embodiment, the driving device 30 includes multiple driving members 31 arranged along the front-rear direction of the hot pressing device. Each driving member 31 includes a push rod 311 that moves up and down. The upper mold plate 21 is provided with mounting members 214 corresponding to each of the multiple driving members 31. The push rod 311 of the driving member 31 is hinged to the mounting member 214. Specifically, the hinged connection between the push rod 311 of the driving member 31 and the mounting member 214 on the upper mold plate 21 ensures that the upper mold plate 21 can make slight but crucial movement adjustments according to the up-and-down movement of the push rod 311. The stroke of the push rod 311 of each driving member 31 can be adjusted independently. This independent control mechanism allows the upper mold plate 21 to perform precise pressure control. Through a gradual pressure environment, the material can obtain gentle pressure guidance in the early stages of molding, avoiding stress concentration caused by sudden pressure changes, and ensuring the mechanical properties and appearance quality of the composite material product.

[0049] like Figure 1 , Figure 5 and Figure 7 As shown, in this embodiment, the lower mold 10, upper mold 20, and driving device 30 are all mounted on the base 40. The base 40 specifically includes a movable frame and support legs mounted on the frame. When the hot pressing device needs to be moved, it can be moved freely to a predetermined position because the frame has wheels at the bottom. After moving to the predetermined position, when molding is required, the support legs are lowered, and the bottom surface of the support legs supports the entire hot pressing device. The wheels are lifted off the ground, and molding can then be performed.

[0050] like Figures 3 to 6 As shown, in this embodiment, the push rod 311 of the driving member 31 is hinged to the mounting member 214 via a hinge 219. The hinge 219 includes an upper hinge point 2191 and a lower hinge point 2192. The push rod 311 is hinged to the upper hinge point 2191, and the mounting member 214 is hinged to the lower hinge point 2192. This structure allows the upper mold plate 21 to swing at a larger angle and more flexibly.

[0051] Preferably, such as Figure 1 , Figures 3 to 6 As shown, in this embodiment, the lower end of the push rod 311 is fitted with a bellows cover 50, and the lower end of the bellows cover 50 abuts against the upper surface of the upper mold plate 21. The lower end of the push rod 311, the mounting part 214, and the hinge part 219 are all covered inside the bellows cover 50.

[0052] Preferably, such as Figure 4 , Figure 5 and Figure 7 As shown, in this embodiment, the base 40 is also provided with a guide shaft 41 in the same axial direction as the push rod 311. The guide shaft 41 can move in the vertical direction. The upper mold plate 21 is provided with a mating seat, and the guide shaft and the mating seat are also hinged together by a hinge. The above structure makes the upper mold plate 21 more reliable when rotating.

[0053] like Figures 8 to 11 As shown, in this embodiment, the first inclined surface 212 is a plane, and a second transition surface 213 is provided between the main molding surface 211 and the first inclined surface 212. The upper mold plate 21 also includes an intermediate transition position located between the first position and the second position. When the upper mold plate 21 is in the transition position, the second transition surface 213 presses against the working surface of the lower mold plate 11. Specifically, when the first inclined surface 212 is designed to be a plane and smoothly connected to the main molding surface 211 through the second transition surface 213, the upper mold plate 21 will experience an intermediate transition position during its rotation from the first position to the second position. In this position, the first and second transition surfaces 213 contact and press against the working surface of the lower mold plate 11. This design can achieve a gradual pressure distribution on the material contact surface, effectively avoiding instantaneous high pressure damage to the material and reducing the generation of indentations. Through the gentle transition of gradual pressure, the material is uniformly compressed in the initial stage of molding, thereby ensuring the morphological stability of the material and improving the surface quality and internal properties of the product. Of course, in other embodiments not shown in the figure, the first inclined surface 212 can be directly set as a curved surface that smoothly transitions with the main molding surface 211. The above structure further improves the uniformity and flexibility of pressure distribution. The contact area between the curved surface and the material changes with the rotation of the upper mold plate 21, which can achieve more precise pressure control, ensuring that the material receives appropriate pressure at different positions, and the final product exhibits better mechanical properties and surface flatness. Preferably, the second transition surface 213 is an arc transition surface.

[0054] In this embodiment, the inclination angle of the first inclined surface 212 is between 3° and 5°, and the length of the first inclined surface 212 is not less than 3% of the length of the upper mold plate 21. If the inclination angle of the first inclined surface 212 is too small, the effect of eliminating indentations will be relatively poor. If the inclination angle of the first inclined surface 212 is too large, the rotation angle of the upper mold plate 21 will be large, thereby affecting the control and the height of the hot pressing device itself. If the length of the first inclined surface 212 is too small, it will also affect the effect of eliminating indentations.

[0055] like Figure 5 , Figures 9 to 11 As shown, in this embodiment, the upper mold plate 21 includes multiple independently arranged hot press plate units 217 arranged from front to back, with the first transition surface 218 located on the front hot press plate unit 217. Specifically, the temperature of the multiple hot press plate units 217 can be set according to actual conditions, with the middle hot press plate unit 217 having a higher temperature and the hot press plate units 217 on both sides having a lower temperature. This structure can ensure both the hot pressing efficiency and the hot pressing quality of the composite material.

[0056] In this embodiment, the bottom corner of the front end of the upper mold plate 21 is rounded, and the surface of the rounded corner forms a first transition surface 218. The ratio between the radius of the rounded corner and the length of the hot press plate unit 217 to which it belongs is between 2% and 5%. If the ratio is less than 2%, the radius of the rounded corner is too small, thus affecting the positive effect of the rounded corner design on indentation. If the ratio is greater than 5%, the area of ​​material hot-pressed by the upper mold plate 21 will be too small, thus affecting the efficiency of hot pressing.

[0057] like Figure 12 As shown, this application also provides a continuous forming apparatus. An embodiment of the continuous forming apparatus according to this application includes: a feeding device 120, a hot pressing device 140, a traction device 150, and a control device. The hot pressing device 140 is disposed behind the feeding device 120 to hot press the material fed out by the feeding device 120 to form a finished material. The hot pressing device 140 is the aforementioned hot pressing device 140. The traction device 150 is disposed behind the hot pressing device 140 and tractions the finished material. Both the hot pressing device 140 and the traction device 150 are electrically connected to the control device. Since the hot pressing device 140 has the effect of alleviating indentations in the production material, the continuous forming apparatus having it also has the aforementioned advantages.

[0058] like Figure 5 and Figure 7As shown, in this embodiment, when the upper mold plate 21 of the hot pressing device 140 includes multiple hot pressing plate units 217, the control device controls the temperature of the hot pressing plate unit 217 located in the middle to be higher than the temperature of the hot pressing plate units 217 located on both sides. Specifically, the foremost hot pressing plate unit 217 is a hot pressing unit for preheating the material, the middle hot pressing plate unit 217 is a hot pressing unit for high-temperature pressing of the material, and the last hot pressing plate unit 217 is a hot pressing unit for low-temperature shaping of the material.

[0059] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0060] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0061] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0062] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A hot pressing device for pressing materials, characterized in that, include: The lower mold (10) includes a lower mold plate (11); An upper mold (20) is disposed above the lower mold (10). The upper mold (20) includes an upper mold plate (21). A first transition surface (218) is provided between the lower surface of the upper mold plate (21) and the front end face of the upper mold plate (21). The distance between the first transition surface (218) and the lower mold plate (11) gradually decreases from front to back.

2. The hot pressing device according to claim 1, characterized in that, The bottom corner of the front end of the upper mold plate (21) is rounded, and the surface of the rounded corner forms the first transition surface (218).

3. The hot pressing device according to claim 1, characterized in that, The lower surface of the upper mold plate (21) includes a main molding surface (211) and a first inclined surface (212) located in front of the main molding surface (211) in the direction of material movement. The first inclined surface (212) gradually slopes downward from front to back, and the first transition surface (218) is connected to the front end of the first inclined surface (212).

4. The hot pressing device according to claim 3, characterized in that, The upper mold plate (21) has a first position for pressing the main molding surface (211) against the working surface of the lower mold plate (11), a second position for pressing the first inclined surface (212) against the working surface of the lower mold plate (11), and a non-working position away from the working surface of the lower mold plate (11); the hot pressing device further includes: The driving device (30) cooperates with the upper mold (20) to drive the upper mold plate (21) to rotate, so that the upper mold plate (21) switches between a first position and a second position. The driving device (30) can also drive the upper mold plate (21) to move, so that the upper mold plate (21) moves to the non-working position.

5. The hot pressing device according to claim 4, characterized in that, The first inclined surface (212) is a plane, and a second transition surface (213) is provided between the main molding surface (211) and the first inclined surface (212). The upper mold plate (21) also includes an intermediate transition position located between the first position and the second position. When the upper mold plate (21) is located at the transition position, the second transition surface (213) is pressed against the working surface of the lower mold plate (11).

6. The hot pressing device according to claim 3, characterized in that, The inclination angle of the first inclined surface (212) is between 3° and 5°, and the length of the first inclined surface (212) is not less than 3% of the length of the upper mold plate (21).

7. The hot pressing device according to claim 1, characterized in that, The upper mold plate (21) includes a plurality of independently arranged hot press plate units (217) arranged from front to back, with the first transition surface (218) located on the front hot press plate unit (217).

8. The hot pressing device according to claim 7, characterized in that, The bottom corner of the front end of the upper mold plate (21) is rounded, and the surface of the rounded corner forms the first transition surface (218). The ratio between the radius of the rounded corner and the length of the hot press plate unit (217) to which it is located is between 2% and 5%.

9. A continuous molding apparatus, comprising: Feeding device (120); A hot pressing device (140) is disposed on the rear side of the feeding device (120) to hot press the material discharged by the feeding device (120) to form a finished material, characterized in that the hot pressing device (140) is the hot pressing device (140) according to any one of claims 1 to 8. A traction device (150) is disposed on the rear side of the hot pressing device (140), and the traction device (150) pulls the finished material; The control device, the hot pressing device (140) and the traction device (150) are both electrically connected to the control device.

10. The uninterrupted molding apparatus according to claim 9, characterized in that, When the upper mold plate (21) of the hot pressing device (140) includes multiple hot pressing plate units (217), the control device controls the temperature of the hot pressing plate unit (217) located in the middle to be higher than the temperature of the hot pressing plate units (217) located on both sides.

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