Hot press molding mold

Abstract

The utility model discloses a hot press forming die relates to mould technical field. Through the direct setting of thermocouple is in the heating of multiple small mould cavities around, makes multiple small mould cavity inside heating more quickly, and heat transfer efficiency is higher, while multiple thermocouples synchronous heating, effectively promoted multiple small mould cavity heating uniformity, reduced the possible of the deformation of mould because of the even heating, through the grouping temperature control of thermocouple and the temperature sensor installed in multiple small mould cavities, not only realized accurate control to multiple small mould cavity temperature, also guaranteed production continuity. The mould cavity body adopts one mould multi -cavity structure, can realize single -time stamping while producing multiple finished products, greatly improved production efficiency, also guaranteed the quality consistency of each finished product, solved the low heat transfer efficiency, low temperature control precision and low production efficiency in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and more specifically, to a hot pressing molding mold. Background Technology

[0002] In the hot pressing process of wind turbine yaw brake pads, the mold is one of the core pieces of equipment, and its performance directly affects the production efficiency and quality of the product. Currently, existing hot pressing molds have several problems in use, as follows: First, the unreasonable heating method leads to low heat transfer efficiency. Existing hot press molds use multiple thermocouple channels pre-reserved in the upper and lower mold plates to install thermocouples. The thermocouples first heat the upper and lower mold plates, which then transfer the heat to the mold cavity—an indirect heating method. This heating method involves multiple interfaces, such as the thermocouple-mold plate interface and the mold plate-mold cavity interface. Increased interfacial contact thermal resistance leads to significant heat loss during transfer, resulting not only in low overall heating efficiency but also prolonged preheating and cooling cycles, increasing energy consumption and production waiting time.

[0003] Secondly, the temperature control accuracy is insufficient. Since the thermocouple directly monitors the temperature of the template rather than the actual temperature of the mold cavity, the template temperature cannot reflect the temperature requirements of the mold cavity in real time, which can easily cause the mold cavity to be too cold or too hot, thus affecting the product molding quality.

[0004] Furthermore, heating uniformity is poor. When heat is indirectly transferred to the mold cavity through the template, uneven template thickness or unreasonable mold structure design may lead to excessive local temperature differences within the mold cavity. The thermal stress generated by the alternation of hot and cold zones can cause mold deformation, shorten mold life, and also lead to product defects.

[0005] In addition, production efficiency is low. Existing hot press molds typically have only one hot press cavity, which can only press and mold one product at a time, making it impossible to achieve parallel production of multiple parts. The overall output rate is low, making it difficult to meet the production needs of large-volume orders.

[0006] To address the problems existing in the prior art, this invention proposes a hot pressing molding die. By optimizing the die structure design, it improves heat transfer efficiency, temperature control accuracy, and production efficiency, thereby ensuring product quality. Utility Model Content

[0007] To address the aforementioned technical problems in the existing technology, this utility model provides a hot pressing molding die, which has the advantages of high heat transfer efficiency, high temperature control accuracy, and high production efficiency.

[0008] The specific technical solution of this utility model is as follows: This utility model provides a hot pressing molding die, including a die body and a template. The template includes an upper template and a lower template arranged opposite to each other, forming a molding space between the upper template and the lower template. The die body is located within the molding space. The mold body includes: The mold cavity body is connected to the lower template via an elastic component; the mold cavity body is provided with a plurality of small mold cavities for molding products, and a plurality of thermocouples are arranged around the plurality of small mold cavities; Multiple small mold cores are disposed on the lower template and correspond one-to-one with multiple small mold cavities; the upper ends of the multiple small mold cores can extend into the interior of the multiple small mold cavities, and the mold cavity body can move up and down relative to the small mold cores; Multiple temperature sensors are disposed inside the mold cavity body and around the multiple small mold cavities for directly monitoring the temperature around the multiple small mold cavities; The multiple thermocouples are divided into multiple independent temperature control groups to maintain temperature stability in case of accidents; the multiple independent temperature control groups are electrically connected to multiple independent temperature control systems to adjust the heating power of the thermocouples in the corresponding temperature control groups to improve temperature control accuracy; the multiple temperature sensors and the multiple temperature control systems are electrically connected one-to-one.

[0009] In one possible implementation, the plurality of thermocouples are divided into two independent temperature control groups, and the thermocouples in the two temperature control groups are arranged alternately around the plurality of small mold cavities.

[0010] In one possible implementation, the number of small mold cavities is four, six, or eight, and they are arranged in a rectangular mold cavity array or a ring mold cavity array.

[0011] Furthermore, multiple temperature sensors are disposed on the left and right sides of the rectangular cavity array or the annular cavity array.

[0012] In one possible implementation, the temperature sensor is a platinum resistance temperature sensor.

[0013] In one possible implementation, the elastic component includes a spring, a connecting stud, and a support beam. The lower end of the connecting stud is fixed to the lower template, and the upper end of the connecting stud passes through the support beam and is fixed with a nut. The spring is sleeved on the connecting stud, and the upper and lower ends of the spring abut against the support beam and the lower template, respectively. The mold cavity body is detachably connected to the support beam.

[0014] In one possible implementation, the upper template, the mold cavity body, and the small mold core are all made of high-temperature resistant alloy material.

[0015] In one possible implementation, a nitride anti-stick coating is provided on the lower surface of the upper template, the inner wall of the small mold cavity, and the upper surface of the small mold core.

[0016] Furthermore, the nitride anti-stick coating is selected from at least one of AlN coating, CrN coating, TiAlN coating, Si3N4 coating and CrAlN coating.

[0017] The positive and progressive effects of this utility model are as follows: This invention provides a hot-press forming mold. By directly placing thermocouples around multiple small mold cavities for heating, heat transfer links are reduced, allowing for faster heating and higher heat transfer efficiency within the cavities. Simultaneous heating by multiple thermocouples effectively improves the heating uniformity of the cavities, reducing the possibility of mold deformation due to uneven heating. Precise temperature control of the cavities is achieved through grouped temperature control of the thermocouples and the installation of temperature sensors around the cavities. The design of multiple independent temperature control systems not only improves temperature control accuracy but also ensures production continuity. Temperature sensors monitor the cavity temperature in real time, providing accurate feedback to the temperature control system, preventing mold deformation caused by temperature gradients, and ensuring the dimensional accuracy and quality stability of the molded products. The mold adopts a multi-cavity structure, combined with multiple small mold cores on the lower mold plate, enabling the simultaneous production of multiple finished products in a single stamping, significantly improving production efficiency, reducing the production time per unit product, and ensuring consistent quality across all finished products through simultaneous multi-cavity production. Attached Figure Description

[0018] Figure 1 This is the front view of the hot pressing mold.

[0019] Figure 2 This is a cross-sectional view of a thermoforming mold.

[0020] Figure 3 This is a top view of the mold cavity body.

[0021] Figure 4 This is a schematic diagram showing the numbering of the thermocouple channels in the mold cavity body.

[0022] Figure 5 This is a 3D view of the small mold core.

[0023] Figure 6 This is a top view of the small mold core.

[0024] Figure Labels 1. Mold body, 2. Template, 11. Mold cavity body, 12. Small mold core, 13. Elastic component, 14. Temperature sensor, 21. Upper template, 22. Lower template, 111. Small mold cavity, 112. Thermocouple channel, 113. Protrusion, 114. Recess, 115. Mounting hole, 131. Spring, 132. Connecting stud, 133. Support beam, 134. Nut. Detailed Implementation

[0025] First, those skilled in the art should understand that the following embodiments are merely used to explain the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0026] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0027] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0028] The specific technical solution of this utility model is as follows: This utility model provides a hot pressing mold, including a mold body and a template. The template includes an upper template and a lower template arranged opposite to each other, forming a molding space between the upper template and the lower template. The mold body is located within the molding space. The mold body includes: The mold cavity body is connected to the lower template via an elastic component; the mold cavity body is provided with a plurality of small mold cavities for molding products, and a plurality of thermocouples are arranged around the plurality of small mold cavities. Multiple small mold cores are disposed on the lower template and correspond one-to-one with multiple small mold cavities; the upper ends of the multiple small mold cores can extend into the interior of the multiple small mold cavities, and the mold cavity body can move up and down relative to the small mold cores; Multiple temperature sensors are disposed inside the mold cavity body and around the multiple small mold cavities for directly monitoring the temperature around the multiple small mold cavities; The multiple thermocouples are divided into multiple independent temperature control groups to maintain temperature stability in case of accidents; the multiple independent temperature control groups are electrically connected to multiple independent temperature control systems to adjust the heating power of the thermocouples in the corresponding temperature control groups respectively; the multiple temperature sensors and the multiple temperature control systems are electrically connected one-to-one.

[0029] This utility model provides a grouped temperature-controlled hot pressing mold. By directly placing the heating elements of multiple thermocouples around multiple small mold cavities on the mold body, heat is directly transferred from the thermocouple heating elements to the mold body and small mold cavities, eliminating the need for intermediate carriers such as upper / lower templates and completely eliminating the interfacial thermal resistance between the template and the mold cavity. Simultaneously, the thermocouples are distributed around the small mold cavities, allowing heat to directly act on the product molding area, further shortening the heat transfer path, reducing heat waste in non-target areas, enabling faster mold cavity heating, significantly shortening the preheating cycle, and reducing energy consumption. Traditional molds often have temperature sensors located on the template, monitoring the template temperature rather than the mold cavity temperature. Due to differences in thermal resistance, there may be significant discrepancies between the two, easily leading to the actual temperature of the mold cavity being too cold or too hot. In this utility model, two or more temperature sensors are directly placed inside the mold cavity, allowing real-time and direct monitoring of the actual temperature of the mold cavity (i.e., the product molding area), obtaining accurate temperature signals, and providing more accurate data to the temperature control system, resulting in higher temperature control precision. Traditional molds typically use multiple heating elements connected to the same temperature control system. If a heating element in a certain area malfunctions or heat loss is uneven, it can lead to excessive localized temperature differences within the mold cavity, affecting product quality. In this solution, multiple thermocouples are divided into at least two independent temperature control groups, each connected to an independent temperature control system. On one hand, the two temperature control systems can adjust the heating power of the thermocouples in their respective areas, offering greater flexibility and promoting more uniform temperature throughout the mold cavity. On the other hand, if one temperature control system or one thermocouple group malfunctions, the other group can still operate independently, maintaining a stable temperature within the mold cavity and ensuring consistent product quality and production continuity. Traditional single-cavity molds can only form one product at a time, limiting production efficiency to the output per cycle. In this invention, the mold cavity body contains one or more smaller cavities, each capable of being independently filled with material. All smaller cavities share the same heating and pressure environment within the mold cavity body. This allows for the simultaneous forming of multiple products within a single hot-pressing cycle, significantly increasing output per unit time, drastically shortening the overall production cycle for mass production, and improving production efficiency.

[0030] In one possible implementation, the multiple thermocouples are divided into two independent temperature control groups, and the thermocouples in the two temperature control groups are alternately arranged around the multiple small mold cavities. The alternating arrangement of the thermocouples around the multiple small mold cavities, rather than their concentrated arrangement, allows each group of thermocouples to evenly cover all the small mold cavities, ensuring a consistent temperature in each small mold cavity within the array, which is beneficial for improving the stability of the molding quality of multiple products.

[0031] In one possible implementation, the number of small mold cavities is four, six, or eight, and they are arranged in a rectangular or circular array within the mold cavities. The design of four, six, or eight small mold cavities can flexibly match production scenarios ranging from small to medium-large batches; the rectangular or circular array arrangement can make full use of the space within the mold cavity body, while reducing the overall volume of the mold and the area occupied by the equipment installation.

[0032] Furthermore, two or more temperature sensors are disposed on the left and right sides of the rectangular mold cavity array or the annular mold cavity array. Distributing two or more temperature sensors on the left and right sides of the rectangular mold cavity array or the annular mold cavity array facilitates monitoring of the temperature at both ends of the mold cavity array.

[0033] In one possible implementation, the temperature sensor is a platinum resistance temperature sensor. The measurement error of a platinum resistance temperature sensor can typically be controlled within ±0.5. o Within a range of C, it can accurately capture subtle changes in mold cavity temperature, ensuring stable product molding quality.

[0034] In one possible implementation, the thermocouple channel is arranged vertically with its opening facing the upper mold plate. This arrangement of the thermocouple channel vertically with its opening facing the upper mold plate provides a better enclosure of the small mold cavity, allowing heat to be transferred more evenly and efficiently into the cavity.

[0035] In one possible implementation, the elastic component includes a spring, a connecting stud, and a support beam. The lower end of the connecting stud is fixed to the lower template, and the upper end of the connecting stud passes through the support beam and is secured with a nut. The spring is sleeved on the connecting stud, with its upper and lower ends abutting against the support beam and the lower template, respectively. The mold cavity is detachably connected to the support beam. This elastic component, consisting of a spring, a connecting stud, and a support beam, with the spring sleeved on the connecting stud and the support beam forming an elastic buffer structure with the lower base, allows the spring to absorb instantaneous impact forces during stamping, effectively dispersing the impact forces during hot pressing and reducing localized stress concentration caused by rigid contact in the mold, thereby improving the forming accuracy and surface quality of the brake pad.

[0036] In one possible implementation, the upper template, the mold cavity body, and the small mold core are all made of high-temperature resistant alloy material. The use of high-temperature resistant alloy material in the upper template, mold cavity body, and small mold core can withstand the high-temperature environment during hot pressing, thus extending the service life of the mold.

[0037] In one possible implementation, a nitride anti-stick coating is provided on the lower surface of the upper template, the inner wall of the small mold cavity, and the upper surface of the small mold core. The nitride anti-stick coating has low surface energy, which can significantly reduce powder adhesion and ensure smooth demolding after hot pressing; at the same time, the nitride coating also has high hardness, which can withstand the frictional wear of hard particles in the powder during hot pressing, extending the service life of the upper template, the mold cavity body, and the small mold core.

[0038] Furthermore, the nitride anti-stick coating is selected from at least one of AlN coating, CrN coating, TiAlN coating, Si3N4 coating, and CrAlN coating. Each of the five nitrides has its own performance focus, adaptable to different production scenarios: the Si3N4 coating has the lowest surface energy, suitable for scenarios with extremely high anti-stick requirements; the TiAlN and CrN coatings have high hardness, wear resistance, and impact resistance, capable of withstanding the friction of hard particles in the powder and extending the life of the pad; the AlN coating has no metal ion migration, suitable for the requirement of high purity of the brake pad, avoiding coating contamination of the powder; the TiAlN and CrAlN coatings are high-temperature resistant, suitable for requirements with higher hot-pressing temperatures.

[0039] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0040] This embodiment provides a group-controlled temperature hot pressing mold, such as Figure 1 and Figure 2 As shown, the mold includes a mold body 1 and a template 2. The template 2 includes an upper template 21 and a lower template 22 arranged opposite each other, forming a molding space between the upper template 21 and the lower template 22. The mold body 1 is located within the molding space. The mold body 1 consists of a mold cavity body 11, a small mold core 12, a temperature sensor 14, a thermocouple, and an elastic component 13.

[0041] like Figure 3 As shown, the mold cavity body 11 adopts a six-cavity layout multi-cavity structure, that is, the mold cavity body 11 has six cylindrical small mold cavities 111 for molding products, and the six small mold cavities 111 form a rectangular mold cavity array; fourteen thermocouple channels 112 are arranged around the small mold cavities 111, the fourteen thermocouple channels 112 are evenly distributed around the small mold cavities 111, the fourteen thermocouple channels 112 are arranged in the vertical direction and the opening faces the upper mold plate 21; the fourteen thermocouples are respectively inserted into the fourteen thermocouple channels 112, and the outer diameter of the thermocouple is adapted to the diameter of the thermocouple channel 112 to ensure that the heat generated by the thermocouple can be efficiently transferred to the small mold cavity 111.

[0042] like Figure 3 and Figure 4 As shown, the fourteen thermocouple channels are numbered sequentially from A1 to A14. The thermocouples inserted into thermocouple channels 112 numbered A1, A3, A5, A7, A9, A11, and A13 are divided into a first temperature control group, and the thermocouples in the first temperature control group are electrically connected to a first temperature control system. The thermocouples inserted into thermocouple channels 112 numbered A2, A4, A6, A8, A10, A12, and A14 are divided into a second temperature control group, and the thermocouples in the second temperature control group are electrically connected to a second temperature control system. The first temperature control system and the second temperature control system can control the first temperature control group and the second temperature control group respectively. Two temperature sensors 14, employing platinum resistance temperature sensors, are symmetrically installed on the left and right sides of the rectangular mold cavity array. The output terminals of the two temperature sensors 14 are connected to the first and second temperature control systems respectively via wires. The temperature sensors 14 can directly detect the temperature around the rectangular mold cavity array and send the detection data to the temperature control system. The temperature control system then controls the heating power of the thermocouples based on the temperature data fed back by the temperature sensors 14, ensuring that the temperature of the rectangular mold cavity array remains stable within the set range. Furthermore, if individual components in one temperature control group fail, the other temperature control system can still operate independently, maintaining the basic heating function of the mold and ensuring production continuity.

[0043] like Figure 5 and Figure 6 As shown, six cylindrical small mold cores 12 are connected to the lower template 22. The outer dimensions of the six small mold cores 12 match the inner dimensions of the six small mold cavities 111. The upper ends of the six small mold cores 12 extend into the interior of the six small mold cavities 111, and a material filling space is reserved above the small mold cores 12. The six small mold cavities 111 can move up and down relative to the six small mold cores 12. In this embodiment, the cross-sectional shape of the small mold cavities 111 and the small mold cores 12 is circular, and the number is six. In other embodiments, the cross-sectional shape of the small mold cavities 111 and the small mold cores 12 can be rectangular or fan-shaped, and the number can be two, four, or eight. The specific shape, number, and size are consistent with the pre-processed product. The upper template 21, the mold cavity body 11, and the small mold core 12 are all made of GH4169 high-temperature resistant alloy material, which can withstand the high-temperature environment during the hot pressing process. In this embodiment, the lower surface of the upper template 21, the inner wall of the small mold cavity 111, and the upper surface of the small mold core 12 are provided with an AlN anti-stick coating, which can significantly reduce powder adhesion and ensure smooth demolding after hot pressing. In other embodiments, CrN coating, TiAlN coating, Si3N4 coating, or CrAlN coating can also be provided on the lower surface of the upper template 21, the inner wall of the small mold cavity 111, and the upper surface of the small mold core 12.

[0044] like Figure 1 and Figure 3As shown, the mold cavity body 11 is connected to the lower template 22 through two sets of elastic components 13. Each set of elastic components 13 has four springs 131, four connecting studs 132, and a support beam 133. The support beam 133 has four through holes. The lower ends of the four connecting studs 132 are fixed to the lower template 22, and the upper ends of the four connecting studs 132 pass through the through holes. Nuts 134 are provided on the upper ends of the four connecting studs 132. The springs 131 are sleeved on the connecting studs 132. The upper and lower ends of the springs 131 abut against the support beam 133 and the lower template 22, respectively. The springs 131 and the nuts 134 define the position of the support beam 133. The mold cavity body 11... The mold cavity body 11 is detachably connected to the support beam 133. The front and rear ends of the mold cavity body 11 connected to the support beam 133 have a serrated structure consisting of alternating protrusions 113 and recesses 114. The serrated structure can better match the surface structure of the support beam 133, making it easy to disassemble and install the mold cavity body 11. When the mold cavity body 11 is installed on the support beam 133, the protrusions 113 are inserted between adjacent nuts 134 on the upper surface of the support beam 133, and the nuts 134 are also located in the space of the recesses 114 of the mold cavity body 11. The mold cavity body 11 can be quickly fixed to the support beam 133 by using easy-to-remove bolts that pass through the mounting holes 115 on the protrusions 113.

[0045] The process of hot pressing a gate plate using a group-controlled temperature hot pressing mold provided in this embodiment is as follows: First, according to the requirements of the product to be formed, the target temperature value of the mold cavity body 11 is set through the temperature control system. After the temperature control system is started, the thermocouples of the first and second temperature control groups start heating simultaneously, and the heat is directly transferred to the inside of the mold cavity body 11. The temperature sensor 14 monitors the temperature of the mold cavity body 11 in real time and feeds the temperature signal back to the temperature control system. When the temperature of the mold cavity body 11 reaches the target temperature, the temperature control system controls the thermocouples to maintain the heating power and keep the temperature of the mold cavity body 11 stable. Subsequently, a certain amount of material is added to each of the six small mold cavities 111, and the upper template 21 is moved downward by the hydraulic press to hot press the material. After the hot pressing is completed, the temperature control system turns off the thermocouple heating. After the mold cools down, the formed product is removed, completing one production cycle. Using the group-controlled temperature hot pressing mold of this embodiment, six products can be produced at a time, which significantly improves production efficiency compared to traditional single-cavity molds; the temperature control accuracy of the mold cavity body 11 can reach ±0.8°C. o C, Heating uniformity error does not exceed 3 o C effectively ensures product quality.

[0046] It should be noted that in the description of this application, the terms "inner" and "outer," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application. All directional indications (such as up, down, left, right, front, back, inner, and outer) are only used to explain the relative positional relationships and movement between components in a specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0047] In the description of this application, the references to terms such as "an embodiment," "some embodiments," "in this embodiment," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0048] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A hot pressing molding die, characterized in that, The mold includes a mold body (1) and a template (2). The template (2) includes an upper template (21) and a lower template (22) arranged opposite to each other. A molding space is formed between the upper template (21) and the lower template (22). The mold body (1) is located in the molding space. The mold body (1) includes: The mold cavity body (11) is connected to the lower template (22) through an elastic component (13); the mold cavity body (11) is provided with a plurality of small mold cavities (111) for molding products, and a plurality of thermocouples are provided around the plurality of small mold cavities (111); Multiple small mold cores (12) are disposed on the lower template (22) and correspond one-to-one with multiple small mold cavities (111); the upper ends of the multiple small mold cores (12) can extend into the interior of the multiple small mold cavities (111), and the mold cavity body (11) can move up and down relative to the small mold cores (12); Multiple temperature sensors (14) are disposed inside the mold cavity body (11) and located around the multiple small mold cavities (111) for directly monitoring the temperature around the multiple small mold cavities (111); The multiple thermocouples are divided into multiple independent temperature control groups to maintain temperature stability in case of accidents; the multiple independent temperature control groups are electrically connected to multiple independent temperature control systems to adjust the heating power of the thermocouples in the corresponding temperature control groups respectively; the multiple temperature sensors and the multiple temperature control systems are electrically connected one-to-one.

2. The hot pressing forming mold according to claim 1, characterized in that, The thermocouples are divided into two independent temperature control groups, and the thermocouples in the two temperature control groups are arranged alternately around the multiple small mold cavities (111).

3. The hot pressing mold according to claim 1, characterized in that, The number of the small cavities (111) is four, six or eight, and they are arranged in a rectangular cavity array or a ring cavity array.

4. The hot pressing forming mold according to claim 3, characterized in that, Multiple temperature sensors (14) are disposed on the left and right sides of the rectangular cavity array or the annular cavity array.

5. The hot pressing forming mold according to claim 1, characterized in that, The temperature sensor (14) is a platinum resistance temperature sensor.

6. The hot pressing mold according to claim 1, characterized in that, The elastic component (13) includes a spring (131), a connecting stud (132), and a support beam (133). The lower end of the connecting stud (132) is fixed on the lower template (22), and the upper end of the connecting stud (132) passes through the support beam (133) and is fixed with a nut (134). The spring (131) is sleeved on the connecting stud (132), and the upper and lower ends of the spring (131) abut against the support beam (133) and the lower template (22) respectively. The mold cavity body (11) is detachably connected to the support beam (133).

7. The hot pressing mold according to claim 1, characterized in that, The upper template (21), the mold cavity body (11), and the small mold core (12) are all made of high-temperature resistant alloy materials.

8. The hot pressing mold according to claim 1, characterized in that, A nitride anti-stick coating is provided on the lower surface of the upper template (21), the inner wall of the small mold cavity (111), and the upper surface of the small mold core (12).

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