Hot pressing die frame with better heating effect

Abstract

The utility model discloses a hot pressing die frame with better heating, which comprises an upper punching plate, an upper punching guide plate, an upper punching guide rod, an upper punching guide sleeve, an upper punching heating seat, an upper punching heating plate, an upper punch, a limiting bolt, a spring, a first heat insulation sleeve piece, a second heat insulation sleeve piece, a middle die plate, a female die, a lower punch and a core rod assembly, the upper punch heating plate is installed at the bottom of the upper punch guide plate, a plurality of first inserting holes corresponding to the lower punches are formed in the upper punch heating plate, a first through groove allowing the first heat insulation sleeve to penetrate through is formed in the upper punch guide plate, and the multiple upper punches are installed at the bottom of the upper punch heating base downwards. The pressing end of each upper punch is movably inserted into the corresponding first inserting hole. According to the utility model, by optimizing the heating layout, the problems of forming defects, such as cracks and insufficient strength, caused by insufficient temperature during hot press forming of a powder forming product are avoided, the density and the strength of the powder forming product are obviously improved, and the product quality is ensured.

Description

Technical Field

[0001] This utility model relates to the field of hot press mold frame technology, and more specifically, to a hot press mold frame with better heating. Background Technology

[0002] Existing powder molding presses mostly use room temperature pressing dies, resulting in products that are prone to loosening after pressing and less than ideal pressing effects. Therefore, powder molding presses with hot pressing mold frames have emerged. Traditional hot pressing mold frames, such as the integrated molding inductive hot pressing mold disclosed in utility model patent number CN210498380U, are equipped with only one upper mold heating seat in the upper mold structure. During hot pressing, the temperature of the upper mold pressure rod needs to be maintained at the temperature required for the hot pressing process to ensure that the powder receives sufficient heat during pressing. However, since the length of the upper mold pressure rod is longer than the thickness of the upper mold heating seat, its heat transfer performance is easily insufficient. The temperature of the lower end of the upper mold pressure rod (i.e., the pressing end) often fails to reach the required temperature during hot pressing. This situation can lead to problems such as cracks, defects, or insufficient strength in the molded product, thereby affecting the overall molding effect and product quality. Utility Model Content

[0003] The purpose of this invention is to overcome the above-mentioned defects in the prior art and provide a hot pressing mold frame that can ensure the temperature of the punch reaches the required temperature before hot pressing, thereby improving the density and strength of powder-molded products and ensuring the quality of product molding.

[0004] To achieve the above objectives, this utility model provides a hot press mold frame with better heating, including an upper punch plate, an upper punch guide plate, upper punch guide rods, upper punch guide sleeves, an upper punch heating seat, an upper punch heating plate, an upper punch head, limiting bolts, springs, a first heat insulation kit, a second heat insulation kit, a middle template, a female mold, a lower punch head, and a mandrel assembly. The upper punch plate and the upper punch guide plate are slidably connected to four upper punch guide rods through upper punch guide sleeves at their four corners. Four limiting bolts are provided and pass downward through the four corners of the upper punch plate and are fixedly connected to the upper punch guide plate. Springs are respectively sleeved on the four limiting bolts and located between the upper punch plate and the upper punch guide plate. The middle template is fixedly connected to the bottom of the four upper punch guide rods. The female mold has several forming holes through its top and bottom for the upper and lower punch heads to insert into and press powder, and is fixedly installed. The mandrel assembly is installed on top of the middle template and passes through the middle template, located below the mother mold. Several lower punches are provided and inserted upwards into forming holes through the mandrel assembly. Each mandrel of the mandrel assembly is movably inserted upwards into the lower punch. The upper punch heating seat is installed at the bottom of the upper punch plate, and the upper punch heating plate is installed at the bottom of the upper punch guide plate. The first and second heat insulation kits are respectively fitted onto the outer walls of the upper punch heating seat and the upper punch heating plate. Several first insertion holes corresponding to the forming holes are opened through the upper punch heating plate. A first through slot is opened on the upper punch guide plate for the first heat insulation kit to pass through. Several upper punches are provided and fixedly installed downwards at the bottom of the upper punch heating seat. The pressing end of each upper punch is movably inserted into a first insertion hole.

[0005] Preferably, the device also includes an upper punch plate pad and a guide plate pad. The upper punch plate pad is fixedly connected between the upper punch heating seat and the upper punch plate, and the guide plate pad is fixedly connected between the upper punch heating plate and the upper punch guide plate. The guide plate pad is configured as a frame structure with its central opening communicating with the first through groove.

[0006] Preferably, the device also includes a first heating rod and a second heating rod. The first heating rod has several parts and is inserted into the interior of the upper heating seat after passing horizontally through the first heat insulation kit. The second heating rod has several parts and is inserted into the interior of the upper heating plate after passing horizontally through the second heat insulation kit.

[0007] Preferably, the mandrel assembly includes a fixing plate, a lower punch heating plate, a lower punch seat, a mandrel guide rod, a fixing plate guide sleeve, a mandrel plate, a mandrel seat, a mandrel block, a mandrel cap, a mandrel seat nut, and a nut pressure block. Four mandrel guide rods are provided, with their tops fixedly connected to the bottom of the middle template. The fixing plate is fixedly connected to the mandrel guide rods via fixing plate guide sleeves at its four corners and is located below the middle template. The lower punch seat is fixedly disposed on the top of the fixing plate. The lower punch heating plate is fixedly disposed on the top of the lower punch seat and inserted into the second through slot of the middle template. The mandrel plate is fixedly connected to the bottom of the mandrel guide rods, and the lower end of the mandrel seat is movably inserted into the middle of the mandrel plate. The mandrel seat nut is fixedly sleeved on the rod body of the mandrel seat. Two nut clamping blocks are provided and respectively fixedly connected to the top of the mandrel plate and abut against the top surface of the mandrel seat nut. Several mandrels are provided and respectively fixedly mounted on the top surface of the mandrel block by mandrel clamping caps. The bottom of the mandrel block is fixedly connected to the top of the mandrel seat and movably passes through the third through slots opened on the fixing plate and the lower punch seat. The tail of the lower punch is fixedly connected to the top of the lower punch heating plate. The lower punch heating plate has a through-hole for each mandrel to pass through. The mandrels can be inserted in pairs into their respective second insertion holes and the mandrel hole at the pressing end of the lower punch.

[0008] Preferably, the mandrel assembly further includes a lower punch cover, a third heating rod, and a fourth heating rod. The lower punch cover is fixedly installed on the outer side wall of the lower punch. The third heating rod has several parts, which pass through the horizontal lower punch cover and are inserted into the interior of the lower punch. The fourth heating rod has several parts, which are horizontally inserted into the interior of the mold.

[0009] Preferably, the mandrel assembly further includes two lower template blocks, each of which is configured as a semi-annular structure, and the two lower template blocks are respectively fixedly disposed at the bottom of the mandrel block.

[0010] Preferably, the upper punch plate, upper punch guide plate, middle template and fixed plate are all provided with condensate flow channels inside, and the upper punch plate, upper punch guide plate, middle template and fixed plate are all provided with two or more water-transporting joints that connect to their respective condensate flow channels on their outer walls.

[0011] Preferably, the system also includes a waterproof plate in front of the upper punch guide plate and a waterproof plate in front of the middle template. The waterproof plate in front of the upper punch guide plate is fixedly installed on the side of the upper punch guide plate away from its water supply connector, and the waterproof plate in front of the middle template is fixedly installed on the side wall of the middle template away from its water supply connector.

[0012] Preferably, it also includes two upper punching blocks, which are respectively fixedly installed on the top of the upper punch plate.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] This utility model features a simple, novel, and rationally designed structure. It employs two heating plates—an upper punch heating seat and an upper punch heating plate—to heat the upper and lower ends of the upper punch in separate zones. This ensures that the upper punch reaches the required temperature before pressing. By optimizing the heating layout, it avoids molding defects caused by insufficient temperature during hot pressing of powder-molded products, such as cracks and insufficient strength. It significantly improves the density and strength of powder-molded products and further shortens the preheating and heating time of the mold frame, thereby improving production efficiency and ensuring product molding effect and overall quality. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of a hot press mold frame with better heating provided by an embodiment of this utility model. Figure 1 ;

[0017] Figure 2 This is a schematic diagram of the structure of a hot press mold frame with better heating provided by an embodiment of this utility model. Figure 2 ;

[0018] Figure 3 This is a cross-sectional schematic diagram of a hot press mold frame with better heating according to an embodiment of the present invention;

[0019] Figure 4 This is an exploded schematic diagram of the upper punch structure of a hot press mold frame with better heating provided by an embodiment of this utility model;

[0020] Figure 5 This is a partial exploded view of a hot press mold frame with better heating provided by an embodiment of this utility model;

[0021] Figure 6 This is a partial schematic diagram of a mandrel assembly for a hot press mold frame with better heating, provided in an embodiment of this utility model;

[0022] Figure 7 This is a schematic diagram of the structure of a mandrel assembly for a hot press mold frame with better heating, provided by an embodiment of this utility model. Figure 3 . Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] Please refer to Figure 1 The present invention provides a hot press mold frame with better heating, including an upper punch plate 1, an upper punch guide plate 2, an upper punch guide rod 11, an upper punch guide sleeve 12, an upper punch heating seat 3, an upper punch heating plate 4, an upper punch head 41, a limiting bolt 5, a spring 51, a first heat insulation kit 31, a second heat insulation kit 42, a middle template 6, a female mold 7, a lower punch head 8, and a mandrel assembly 9, etc. The components of this embodiment will be described in detail below with reference to the accompanying drawings.

[0025] like Figures 1 to 3 As shown, the upper punch plate 1 and the upper punch guide plate 2 are slidably connected to the four upper punch guide rods 11 through the upper punch guide sleeves 12 at their four corners. There are four limiting bolts 5, which pass through the four corners of the upper punch plate 1 downwards and are fixedly connected to the upper punch guide plate 2. Springs 51 are respectively sleeved on the four limiting bolts 5 and located between the upper punch plate 1 and the upper punch guide plate 2. The middle template 6 is fixedly connected to the bottom of the four upper punch guide rods 11. The mother mold 7 has several forming holes 70 through which the upper punch head 41 and the lower punch head 8 are inserted to press the powder and is fixedly installed on the top of the middle template 6. The forming holes 70 are arranged at intervals. The mandrel assembly 9 passes through the middle template 6 and is located below the mother mold 7. There are several lower punch heads 8, which are inserted into the forming holes 70 through the mandrel assembly 9 upwards. Each mandrel 91 of the mandrel assembly 9 is movably inserted into the lower punch head 8 upwards.

[0026] Among them, the limiting bolt 5 can limit the maximum range of movement of the upper punch plate 1 relative to the upper punch guide plate 2, ensuring that it will not be over-displaced during heating and pressurization, while the spring 51 is conducive to the reset of the upper punch plate 1.

[0027] like Figure 4As shown, the upper punch heating seat 3 can be installed at the bottom of the upper punch plate 1, and the upper punch heating plate 4 is installed at the bottom of the upper punch guide plate 2. The first heat insulation kit 31 and the second heat insulation kit 42 are respectively sleeved on the outer side walls of the upper punch heating seat 3 and the upper punch heating plate 4. The upper punch heating plate 4 has several first insertion holes 40 that correspond to the forming holes 70. The upper punch guide plate 2 has a first through groove 21 for the first heat insulation kit 31 to pass through. Several upper punches 41 are provided and are fixedly installed at the bottom of the upper punch heating seat 3 facing downwards. The pressing end of each upper punch 41 is movably inserted into the first insertion hole 40.

[0028] Furthermore, the upper punch guide plate 2, through its connection with the upper punch plate 1, ensures accurate guidance of the upper punch structure, keeping the upper part of the mold frame stable during hot pressing. The upper punch heating seat 3 provides a heat source base for the upper punch head 41 during hot pressing, effectively conducting heat and improving the uniformity and efficiency of heating. In addition, the upper punch heating plate 4 can provide auxiliary heating for the upper punch head 41, ensuring the quality of powder molding. The first heat insulation kit 31 and the second heat insulation kit 42 can respectively ensure the heating effect of the upper punch heating seat 3 and the upper punch heating plate 4, reducing heat loss, improving heating efficiency, and ensuring the maximization of heat utilization during hot pressing.

[0029] Specifically, it may also include an upper punch plate pad 32 and a guide plate pad 43. The upper punch plate pad 32 is fixedly connected between the upper punch heating seat 3 and the upper punch plate 1, and the guide plate pad 43 is fixedly connected between the upper punch heating plate 4 and the upper punch guide plate 2. The guide plate pad 43 is configured as a frame structure with its central opening connected to the first through groove 21.

[0030] Among them, the upper punch plate pad 32 and the guide plate pad 43 not only facilitate the installation of the upper punch heating seat 3 and the upper punch heating plate 4 and increase the stability of the structure, but also isolate the heat of the upper punch heating seat 3 and the upper punch heating plate 4 from the heat exchange between the upper punch plate 1 and the upper punch guide plate 2, thereby improving the service life of the mold frame.

[0031] Preferably, it may also include a first heating rod 33 and a second heating rod 44. The first heating rod 33 has several parts and is inserted into the interior of the upper heating seat 3 after passing horizontally through the first heat insulation kit 31. The second heating rod 44 has several parts and is inserted into the interior of the upper heating plate 4 after passing horizontally through the second heat insulation kit 42. The first heating rod 33 and the second heating rod 44 are respectively distributed inside the upper heating seat 3 and the upper heating plate 4, which improves the uniformity of heat distribution to meet different heating needs.

[0032] Preferably, it may also include two upper punch blocks 14, which are respectively fixedly disposed on the top of the upper punch plate 1. The upper punch blocks 14 can serve as additional support structures to improve the load-bearing capacity of the entire mold frame.

[0033] like Figure 5 As shown, the mandrel assembly 9 may include a fixing plate 92, a lower punch heating plate 93, a lower punch seat 94, a mandrel guide rod 95, a fixing plate guide sleeve 921, a mandrel plate 96, a mandrel seat 97, a mandrel block 98, a mandrel pressure cap 981, a mandrel seat nut 971, and a nut pressure block 972. Four mandrel guide rods 95 are provided, and the tops of the four mandrel guide rods 95 are fixedly connected to the bottom of the middle template 6. The fixing plate 92 is fixedly connected to the mandrel guide rods 95 through the fixing plate guide sleeves 921 at its four corners and is located below the middle template 6. The lower punch seat 94 is fixedly installed on the top of the fixed plate 92. The lower punch heating plate 93 is fixedly installed on the top of the lower punch seat 94 and inserted into the second through groove 61 of the middle template 6. The mandrel plate 96 is fixedly connected to the bottom of the mandrel guide rod 95. The lower end of the mandrel seat 97 is movably inserted into the middle of the mandrel plate 96. The mandrel seat nut 971 is fixedly sleeved on the rod body of the mandrel seat 97. Two nut pressure blocks 972 are provided and are respectively fixedly connected to the top of the mandrel plate 96 and abut against the top surface of the mandrel seat nut 971.

[0034] The fixed plate 92 provides stable foundation support, ensuring the stability of other components and reducing vibration during hot pressing. The lower punch heating plate 93 is installed on top of the lower punch seat 94 to heat the lower punch head 8, ensuring the temperature and fluidity of the molding material and helping to improve molding efficiency. The lower punch seat 94 provides support for the lower punch heating plate 93 and other components.

[0035] like Figure 6 As shown, several mandrels 91 can be provided and fixedly mounted on the top surface of the mandrel block 98 by mandrel caps 981. The bottom of the mandrel block 98 is fixedly connected to the top of the mandrel seat 97 and movably passes through the third through slots 922 opened on the fixed plate 92 and the lower punch seat 94. The tail of the lower punch 8 is fixedly connected to the top of the lower punch heating plate 93. The lower punch heating plate 93 has a second insertion hole 932 through which each mandrel 91 passes. The mandrels 91 can be inserted in pairs into their respective second insertion holes 932 and the mandrel holes 81 at the pressing end of the lower punch 8. The mandrels 91 are used to form a specific internal structure during the hot pressing process. In specific implementation, the number and position of the mandrels 91 can be adjusted according to actual needs to meet different molding requirements.

[0036] Specifically, the mandrel assembly 9 may also include a lower punch cover 941, a third heating rod 931 and a fourth heating rod 71. The lower punch cover 941 is fixedly covered on the outer wall of the lower punch 94. The third heating rod 931 has several parts and is inserted into the lower punch 94 after passing through the horizontal lower punch cover 941. The fourth heating rod 71 has several parts and is inserted horizontally into the mold 7.

[0037] The third heating rod 931 is disposed inside the lower punch 94 to provide heating and ensure uniform heat distribution during the molding process. The fourth heating rod 71 is uniformly installed inside the mother mold 7 to further improve the heating efficiency of the mother mold 7.

[0038] Preferably, the mandrel assembly 9 may also include two lower template pressing blocks 99, each of which is configured as a semi-annular structure, and the two lower template pressing blocks 99 are respectively fixedly disposed at the bottom of the mandrel block 98.

[0039] like Figure 7 As shown, the upper punch plate 1, the upper punch guide plate 2, the middle template 6 and the fixed plate 92 can all be provided with condensate flow channels inside, and the upper punch plate 1, the upper punch guide plate 2, the middle template 6 and the fixed plate 92 are all provided with two or more water-transporting connectors 13 that connect to their respective condensate flow channels on their outer walls.

[0040] During implementation, during the cooling process after product mold opening or molding, the condensate flow channels in each section can be connected to the water pipe through their corresponding water pipe connectors 13, so that the condensate can flow effectively in each section, thereby improving the molding efficiency of powder molding products.

[0041] Preferably, in order to extend the service life of the mold frame and ensure its stable and reliable operation during hot pressing, it may also include a waterproof plate 22 in front of the upper punch guide plate and a waterproof plate 62 in front of the middle mold plate. The waterproof plate 22 in front of the upper punch guide plate is fixedly installed on the side of the upper punch guide plate 2 away from its water supply connector 13, and the waterproof plate 62 in front of the middle mold plate is fixedly installed on the side wall of the middle mold plate 6 away from its water supply connector 13.

[0042] The working principle of this embodiment is as follows:

[0043] First, the first heating rod 33 and the second heating rod 44 heat the upper punch heating seat 3, the upper punch heating plate 4, and the upper punch head 41 respectively. The third heating rod 931 heats the lower punch seat 94 and the mandrel 91. The fourth heating rod 71 heats the female mold 7 and the lower punch head 8. The lower drive device of the external powder forming press moves the mandrel seat 97 and the mandrel 91 upward to a distance from the female mold 7. At this time, the operator or robot can place a product such as an inductor coil onto the female mold 7. The coil body of the inductor coil is located in the forming hole 70 of the female mold 7. Then, powder is filled into the forming hole 70 of the female mold 7 manually or by the powder feeding device of the powder forming press. At the same time, the upper drive device of the external powder forming press moves the upper punch plate 1 and the upper punch guide plate 2 downward respectively. When the bottom of the upper punch guide plate 2 contacts the top of the female mold 7, the upper drive device continues to drive the upper punch plate 1 to move downward and squeeze the spring 51, and cause the upper punch head 41 to pass through the upper punch heating plate 4 and extend into the forming hole 70. At this time, the heated upper punch head 41 can press the metal powder filled in the forming hole 70 of the female mold 7 together with the lower punch head 9 and the core rod 91, so that the metal powder wraps the coil body of the inductor coil, and the hot pressing obtains the final inductor product. Then, the upper drive device drives the upper punch plate 1 to move upward respectively, and the spring 51 can drive the upper punch head 41 to quickly return to its original position under the elastic action, and then the upper punch guide plate 2 moves upward. The lower drive device also drives the core rod 91 to move downward. Finally, the product is cooled by connecting condensate water through each water connector 13 and water pipe, thus completing one hot pressing forming operation.

[0044] It should be noted that the upper and lower drive devices of the powder forming press described in this embodiment are conventional mechanisms of powder forming presses currently on the market. The hot press mold frame of this embodiment can be used with various powder forming presses and can be replaced with any model. This embodiment only involves structural improvements to the hot press mold frame for better heating.

[0045] In summary, this invention employs two heating plates—an upper punch heating seat and an upper punch heating plate—to heat the upper and lower ends of the upper punch in separate zones. This ensures that the upper punch reaches the required temperature before pressing. By optimizing the heating layout, it avoids molding defects caused by insufficient temperature during hot pressing of powder-molded products, such as cracks and insufficient strength. This significantly improves the density and strength of powder-molded products and further shortens the preheating and heating time of the mold frame, thereby improving production efficiency and ensuring product molding effect and overall quality.

[0046] The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model shall be considered equivalent substitutions and shall be included within the protection scope of the present utility model.

Claims

1. A hot press mold frame with better heating, characterized in that: The assembly includes an upper punch plate (1), an upper punch guide plate (2), an upper punch guide rod (11), an upper punch guide sleeve (12), an upper punch heating seat (3), an upper punch heating plate (4), an upper punch head (41), a limiting bolt (5), a spring (51), a first heat insulation kit (31), a second heat insulation kit (42), a middle template (6), a female mold (7), a lower punch head (8), and a mandrel assembly (9). The upper punch plate (1) and the upper punch guide plate (2) slide against the four upper punch guide rods (11) through the upper punch guide sleeves (12) at their four corner positions. The moving connection includes four limiting bolts (5) that pass downward through the four corners of the upper punch plate (1) and are fixedly connected to the upper punch guide plate (2). The springs (51) are respectively sleeved on the four limiting bolts (5) and located between the upper punch plate (1) and the upper punch guide plate (2). The middle template (6) is fixedly connected to the bottom of the four upper punch guide rods (11). The female mold (7) has several forming holes (70) through it, allowing the upper punch (41) and lower punch (8) to insert into the powder and is fixedly installed on the middle template (6). At the top, the mandrel assembly (9) passes through the middle template (6) and is located below the female mold (7). The lower punch (8) has several mandrels inserted upward through the forming holes (70) of the mandrel assembly (9). Each mandrel (91) of the mandrel assembly (9) is movably inserted upward through the lower punch (8). The upper punch heating seat (3) is installed at the bottom of the upper punch plate (1). The upper punch heating plate (4) is installed at the bottom of the upper punch guide plate (2). The first heat insulation kit (31) and the second heat insulation kit ( 42) The upper punch heating seat (3) and the upper punch heating plate (4) are respectively fitted on the outer side wall. The upper punch heating plate (4) has several first insertion holes (40) that correspond to the forming holes (70). The upper punch guide plate (2) has a first through groove (21) for the first heat insulation kit (31) to pass through. The upper punch (41) has several and is fixedly installed at the bottom of the upper punch heating seat (3) with the upper punch facing downward. The pressing end of each upper punch (41) is movably inserted into the first insertion hole (40).

2. The hot press mold frame with better heating according to claim 1, characterized in that: It also includes an upper punch plate pad (32) and a guide plate pad (43). The upper punch plate pad (32) is fixedly connected between the upper punch heating seat (3) and the upper punch plate (1). The guide plate pad (43) is fixedly connected between the upper punch heating plate (4) and the upper punch guide plate (2). The guide plate pad (43) is configured as a frame structure with its central opening connected to the first through groove (21).

3. The hot press mold frame with better heating according to claim 1, characterized in that: It also includes a first heating rod (33) and a second heating rod (44). The first heating rod (33) has several rods that pass horizontally through the first heat insulation kit (31) and are inserted into the interior of the upper heating seat (3). The second heating rod (44) has several rods that pass horizontally through the second heat insulation kit (42) and are inserted into the interior of the upper heating plate (4).

4. A hot press mold frame with better heating according to claim 1, characterized in that: The mandrel assembly (9) includes a fixing plate (92), a lower punch heating plate (93), a lower punch seat (94), a mandrel guide rod (95), a fixing plate guide sleeve (921), a mandrel plate (96), a mandrel seat (97), a mandrel block (98), a mandrel cap (981), a mandrel seat nut (971), and a nut clamping block (972). The mandrel guide rod (95) has four rods, and the tops of the four mandrel guide rods (95) are fixedly connected to the bottom of the middle template (6). The fixing plate (92)... 2) The mandrel guide rod (95) is fixedly connected to the fixed plate guide sleeve (921) at its four corners and is located below the middle template (6). The lower punch seat (94) is fixedly set on the top of the fixed plate (92). The lower punch heating plate (93) is fixedly set on the top of the lower punch seat (94) and inserted into the second through groove (61) of the middle template (6). The mandrel plate (96) is fixedly connected to the bottom of the mandrel guide rod (95). The lower end of the mandrel seat (97) is movably inserted into the mandrel guide rod. In the middle of the rod plate (96), the mandrel seat nut (971) is fixedly sleeved on the rod body of the mandrel seat (97). Two nut pressure blocks (972) are provided and are respectively fixedly connected to the top of the mandrel plate (96) and abut against the top surface of the mandrel seat nut (971). Several mandrels (91) are provided and are respectively fixedly set on the top surface of the mandrel block (98) by mandrel pressure caps (981). The bottom of the mandrel block (98) and the top of the mandrel seat (97) are connected. The lower punch (8) is fixedly connected and movably inserted into the third through slot (922) opened on the fixed plate (92) and the lower punch seat (94). The tail of the lower punch (8) is fixedly connected to the top of the lower punch heating plate (93). The lower punch heating plate (93) has a second insertion hole (932) through which each core rod (91) passes. The core rod (91) can be inserted into each corresponding second insertion hole (932) and the core rod hole (81) of the pressing end of the lower punch (8) in pairs.

5. A hot press mold frame with better heating according to claim 4, characterized in that: The core rod assembly (9) also includes a lower punch cover (941), a third heating rod (931) and a fourth heating rod (71). The lower punch cover (941) is fixedly installed on the outer side wall of the lower punch (94). The third heating rod (931) has several parts and is inserted into the lower punch (94) after passing through the horizontal lower punch cover (941). The fourth heating rod (71) has several parts and is inserted horizontally into the mold (7).

6. A hot press mold frame with better heating according to claim 4, characterized in that: The mandrel assembly (9) also includes two lower template blocks (99), each of which is configured as a semi-annular structure. The two lower template blocks (99) are respectively fixedly disposed at the bottom of the mandrel block (98).

7. A hot press mold frame with better heating according to claim 4, characterized in that: The upper punch plate (1), upper punch guide plate (2), middle template (6) and fixed plate (92) are all provided with condensate flow channels inside, and the upper punch plate (1), upper punch guide plate (2), middle template (6) and fixed plate (92) are all provided with two or more water-transporting connectors (13) that connect to their respective condensate flow channels on their outer walls.

8. A hot press mold frame with better heating according to claim 7, characterized in that: It also includes a waterproof plate (22) in front of the upper punch guide plate and a waterproof plate (62) in front of the middle template. The waterproof plate (22) in front of the upper punch guide plate is fixedly installed on the side of the upper punch guide plate (2) away from its water supply connector (13), and the waterproof plate (62) in front of the middle template is fixedly installed on the side wall of the middle template (6) away from its water supply connector (13).

9. A hot press mold frame with better heating according to claim 1, characterized in that: It also includes two upper punch blocks (14), which are fixedly installed on the top of the upper punch plate (1).

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