A process for inlaying male head of mold

Abstract

The present invention relates to a male head inlay process of a mold, which belongs to the technical field of mold manufacturing and comprises the following steps: S1: material preparation and cutting: according to the structure of the mold, the prepared blank block is cut according to the complexity of the structure, and the complex structural part is separated from the main body to form at least three rough blank blocks; S2: rough processing of the rough blank block: the three rough blank blocks are respectively transported to corresponding processing equipment for stamping and forging to form preliminary blank blocks; S3: fine processing of the preliminary blank block: the three preliminary blank blocks are simultaneously fine processed on different processing equipment to form fine blank blocks; S4: inlaying the three fine blank blocks: the three fine blank blocks are respectively an upper mold male head block, a nut block and a screw male head block; S401: threaded assembly of the nut block and the upper mold male head block: S402: hot inlay assembly of the screw male block and the upper mold male head block. The present application can simplify a mold that is integrally formed and has a complex structure, thereby improving the service life of the mold and the processing accuracy of the product.

Description

Technical Field

[0001] The invention belongs to the technical field of mold manufacturing, and particularly relates to a male head inlaying process of a mold. Background Art

[0002] The existing mold production process usually includes the following steps: mold design - material preparation - rough machining and fine machining - heat treatment - surface treatment and other processes. It can be seen that the mold is continuously processed and formed in a piece of metal block. Usually, the structure on the mold is a whole. For some products with more complex structures, the structure of the mold will also be more complex, which will lead to different structural strength of the mold surface.

[0003] During the use of the mold, thousands of tons of extrusion pressure is simultaneously applied toward the male head and the outer circle. The extrusion pressure in the outer circle is divided into the front, back, left and right directions. At the same time, the extrusion pressure from multiple directions acts on the upper mold, and pulls each other to produce a strong shear force. In addition, for the one-piece mold, the upper mold bridge root is under the strongest pressure, but it is often the part with relatively weak expansion strength. When the upper mold bridge root cannot withstand the pressure from all aspects, the bridge breaks or cracks.

[0004] Therefore, the molds for extruding aluminum alloys are more prone to cracking or breaking during the production process. Ordinary molds can only produce 3 tons at most, and some even crack after producing only a few hundred kilograms, so the production cost is very high.

[0005] Generally, when the above problems occur in complex upper mold foreman, the mold cannot be repaired, or after repair, it cannot achieve the required precision and service life. It is usually scrapped directly, causing great losses. However, the production cost of a single mold is extremely high, usually the cost of a mold ranges from tens of thousands to hundreds of thousands. The directly scrapped mold leads to increased production cost of the product, resulting in high mold production cost and short service life.

[0006] Therefore, there is an urgent need for a manufacturing process that can improve the service life of the mold. Summary of the Invention

[0007] In order to solve the above problems existing in the prior art, the present invention provides a mold male head inlaying process to solve the problem that the existing one-piece mold is prone to cracking of the upper mold male head during product production and the high cost of replacing the damaged mold.

[0008] The purpose of the present invention can be achieved through the following technical solutions:

[0009] A process for inserting a male head of a mold comprises the following steps:

[0010] S1: Material preparation and cutting: Cut the prepared blank block into sections according to the complexity of the structure according to the structure of the mold, separate the complex parts from the main body, and form at least three rough blank blocks;

[0011] S2: rough processing of the rough blank: transporting the three rough blanks to corresponding processing equipment for stamping and forging to form preliminary blanks;

[0012] S3: performing fine processing on the preform blocks: performing fine processing on three preform blocks simultaneously on different processing equipment to form fine blocks;

[0013] S4: inlaying the three refined blanks: the three refined blanks are an upper die male block, a nut block and a screw male block;

[0014] S401: Thread assembly of the nut block and the upper die male block:

[0015] S402: The screw male block and the upper die male block are assembled by hot-inserting.

[0016] Preferably, the upper mold male head block includes a solid part and a core part; there are several mold cavities between the solid part and the core part, and bridges are provided between the mold cavities and spaced by the bridges, one end of the bridge is connected to the solid part, and the other end is connected to the core part.

[0017] Preferably, S401 further includes the following steps:

[0018] S4011: Roughly machining a connection between any one of the bridges and the solid portion to form a first male connector;

[0019] S4012: Fine-processing the first male head, processing a first mounting groove at the top center of the first male head, wherein the first mounting groove has threads for threaded connection with the nut block.

[0020] Preferably, an elastic groove is further provided at the bottom of the first inlay groove, and a stress pad is filled in the elastic groove, and the stress pad abuts against the nut block.

[0021] Preferably, the ratio of the diameter of the stress pad to the diameter of the nut block is 1:2.

[0022] Preferably, the fine processing of the first male head in S4012 further includes processing the portion where the first male head is connected to the connecting bridge and the core portion into a smooth curved surface.

[0023] Preferably, from the connecting bridge to the nut block, the first male head is shaped like a column that gradually becomes smaller.

[0024] Preferably, the vertical overlap between the first male connector and the connecting bridge is at least 8 mm.

[0025] Preferably, a diversion hole is machined at the center of the upper die male block, and the diversion hole is used for inlaying with the screw male block. S402 further includes the following steps:

[0026] S4021: Preheating, preheating the screw block and diversion hole;

[0027] S4022: Apply inlay coating, apply a layer of inlay coating on the contact surface of the screw block and the diversion hole;

[0028] S4023: heating and mounting, placing the screw block coated with the mounting coating and the diversion hole together into a heating device for heating treatment;

[0029] S4024: Cooling and solidifying: naturally cooling the inlaid screw head and upper die male head block to solidify the inlaid coating.

[0030] Preferably, the material of the blank block is hard aluminum alloy.

[0031] The beneficial effects of the present invention are:

[0032] The mold inlay process in this application can simplify the one-piece and complex structure of the upper mold male head, process the complex structural parts of the mold separately, and then inlay them into a main body after processing. In this way, even if local damage occurs during the use of the mold, only the damaged part needs to be replaced without replacing the entire mold, which greatly improves the service life of the mold and the processing accuracy of the product, increases production capacity and reduces costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] To facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0034] Figure 1 A flowchart of a male head inserting process of a mold provided in one embodiment of the present invention;

[0035] Figure 2 This is a schematic diagram of a top view of a mold provided in one embodiment of the present invention;

[0036] Figure 3 A schematic side view of the structure of a mold provided in one embodiment of the present invention;

[0037] Figure 4 A schematic diagram of a first male head embedding structure provided in one embodiment of the present invention;

[0038] Legend: 1. Upper mold male head block; 11. Solid part; 12. Core part; 13. Mold cavity; 14. Connecting bridge; 2. Nut block; 3. Screw male head; 4. First male head; 41. First mounting groove; 42. Elastic groove; 5. Stress pad; 6. Diverter hole. DETAILED DESCRIPTION

[0039] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0040] like Figures 1-4 As shown, a process for inserting a male head of a mold includes the following steps:

[0041] S1: Material preparation and cutting: Cut the prepared blank block into sections according to the complexity of the structure according to the structure of the mold, separate the complex parts from the main body, and form at least three rough blank blocks;

[0042] S2: rough processing of the rough block: transporting the three rough blocks to corresponding processing equipment for stamping and forging to form preliminary blocks;

[0043] S3: Finishing the green blocks: Finishing the three green blocks simultaneously on different processing equipment to form finished green blocks;

[0044] S4: Inlaying three refined blanks: the three refined blanks are upper die male block 1, nut block 2 and screw male block 3;

[0045] S401: Thread assembly of nut block 2 and upper die male block 1:

[0046] S402: The screw male block 3 and the upper die male block 1 are assembled by hot-inserting.

[0047] In one embodiment, the upper mold male head block 1 includes a solid part 11 and a core part 12; there are a plurality of mold cavities 13 between the solid part 11 and the core part 12, and the mold cavities 13 are separated by bridges 14, one end of the bridge 14 is connected to the solid part 11, and the other end is connected to the core part 12.

[0048] First, in the material preparation and cutting step (S1), a hard aluminum alloy billet that meets production requirements is selected. The material is selected based on its high strength, corrosion resistance, and good machinability. This billet is then cut into three rough blocks according to the specifications and dimensions of the design drawings. Subsequently, in the rough machining step (S2), the three rough blocks obtained from the above cutting are transported to a stamping machine and forging equipment respectively. In the finishing step (S3), the three rough blocks are fixed to high-precision CNC machine tools for processing. Different equipment performs fine processing based on the characteristics of each rough block, including precision cutting, surface polishing, and aperture machining, so that the surface finish and dimensional accuracy meet the design requirements. Through this finishing process, the refined billets corresponding to the functional components of the mold are formed, namely, the upper die male block 1, the nut block 2, and the screw male block 3.

[0049] Next, in the assembly step (S4), the three refined blanks are assembled in sequence. The upper die male block 1 includes a solid portion 11 and a core portion 12, which are separated by a number of mold cavities 13 and connected by bridges 14. The bridges 14 are designed to transmit and support stress between the solid portion 11 and the core portion 12. The number and distribution of bridges 14 are determined based on mold stress analysis and optimization, avoiding bridge breakage caused by concentrated force while ensuring the integrity and stability of the mold cavity 13 structure. In step S401, the nut block 2 is fixed to the upper die male block 1 via a threaded connection. The threaded connection is machined using a high-precision thread milling machine to ensure thread size matching and sealing performance.

[0050] In step S402, a hot-setting process is used to secure the screw male block 3 to the upper mold male block 1. First, the screw male block 3 and the diverter hole 6 at the center of the upper mold male block 1 are preheated to 250°C to 300°C to eliminate residual stress in the material. Then, a layer of inlay coating is evenly applied to the contact surface between the screw male block 3 and the diverter hole 6. The coating material is a high-temperature ceramic-based composite material with excellent wear resistance and shear resistance. Subsequently, the coated screw male block 3 and the diverter hole 6 are placed in a heating device at a temperature of 500°C to 550°C to ensure full fusion between the coating and the substrate. Finally, the mold is cured by natural cooling to form a strong and durable joint.

[0051] In summary, the mold inlay process in this application can simplify the one-piece mold with complex structure, process the complex structural parts of the mold separately, and then inlay them into a main body after processing. In this way, even if local damage occurs during the use of the mold, only the damaged part needs to be replaced without replacing the entire mold, which greatly improves the service life of the mold and the processing accuracy of the product, increases production capacity and reduces costs.

[0052] In one embodiment, S401 further includes the following steps:

[0053] S4011: Roughly process a first male connector 4 at a connection point between any connecting bridge 14 and the solid portion 11;

[0054] S4012: Fine-process the first male head 4 and form a first inlay groove 41 at the top center of the first male head 4. The first inlay groove 41 has threads for threaded connection with the nut block 2.

[0055] In step S4011, the specific machining position of the connection between the bridge 14 and the solid portion 11 is first determined. This position is selected based on a stress analysis of the mold structure design to ensure that the first male head 4 is in a position with optimal mechanical properties while preventing structural failure due to uneven stress during use. The mold is then fixed to a multi-axis CNC machining center, and the connection area is cut using a rough machining tool to gradually form the rough shape of the first male head 4. During the machining process, the cutting parameters are strictly calculated and optimized to ensure a smooth machined surface and avoid stress concentration or surface hardening caused by excessive cutting. After the rough machining is completed;

[0056] In step S4012, the first male head 4 is fine-machined to meet the final assembly requirements. First, the rough-machined first male head 4 is transferred to a high-precision CNC lathe, and its surface is further processed using a micro-cutting tool to ensure that the shape and size of the first male head 4 meet the design standards. Subsequently, the center position of the top of the first male head 4 is precisely positioned, and a first inlay groove 41 with threads is machined using a thread milling machine. In addition, in order to further improve the reliability of the threaded connection, the first inlay groove 41 adopts a multiple-feed method during the processing, that is, the target depth is reached by step-by-step cutting to avoid thread deformation or precision deviation caused by a single excessively deep cutting; at the same time, in order to ensure the sealing performance after the thread is connected to the nut block 2, a guide bevel is machined at the bottom of the first inlay groove 41 to improve the interlocking stability and bonding strength of the thread.

[0057] Through the above steps, this embodiment not only ensures the mechanical properties and processing accuracy of the first male head 4 in the mold structure, but also achieves a high-strength and reliable connection between the first male head 4 and the nut block 2 through high-quality thread processing, thereby providing a strong guarantee for the overall performance of the mold.

[0058] In one embodiment, an elastic groove 42 is further provided at the bottom of the inlay groove, and a stress pad 5 is filled in the elastic groove 42. The stress pad 5 abuts against the nut block 2. The design of the elastic groove 42 needs to take into account the stress characteristics and material properties in the mold usage scenario. The shape of the elastic groove 42 is processed into an annular groove, and its depth and width are optimized through mechanical simulation analysis to ensure that it can accommodate the stress pad 5 without affecting the mold strength due to the thin groove wall. After processing, the depth and width of the groove body are detected using a three-dimensional measuring instrument to ensure that the error with the design size is controlled within ±0.01mm. The material of the stress pad 5 is a high-temperature resistant elastic polymer with excellent compression resistance and stress buffering properties. When filling the stress pad 5, the stress pad 5 needs to be cut according to the diameter of the nut block 2 and the design parameters of the elastic groove 42 to ensure that it is completely embedded in the elastic groove 42 and tightly fits the groove wall;

[0059] A thin layer of adhesive is applied between the stress pad 5 and the elastic groove 42 using a quantitative glue coating device to enhance the bonding strength between the two and avoid displacement of the stress pad 5 due to vibration or high-frequency loads during use. During the assembly process, the stress pad 5 achieves a buffering and dispersing effect on the pressure transmitted to the nut block 2 through direct contact with the nut block 2. Especially when the mold is subjected to high-intensity multi-directional extrusion pressure, the stress pad 5 can effectively absorb and disperse the concentrated stress at the threaded connection, reducing the risk of damage to the mold structure due to local force. At the same time, the elastic properties of the stress pad 5 allow it to quickly return to its original state when subjected to impact loads, thereby improving the overall impact resistance of the mold.

[0060] In one embodiment, the ratio of the diameter of the stress pad 5 to the diameter of the nut block 2 is 1:2, and the size of the stress pad 5 is determined according to the diameter of the nut block 2. For example, when the diameter of the nut block 2 is 20 mm, the diameter of the stress pad 5 is designed to be 10 mm. This proportional design enables the stress pad 5 to completely cover the key stress-bearing area at the bottom of the thread, while avoiding affecting the connection performance due to being too large or too small. The stress pad 5 has excellent resistance to permanent compression deformation and high temperature resistance, and can maintain good elastic recovery ability within the operating temperature range of the mold. The stress pad 5 is manufactured using high-precision molding technology to ensure that its diameter tolerance is controlled within ±0.05 mm, and the surface is smooth and burr-free, thereby achieving a gap-free fit with the elastic groove 42.

[0061] During installation, the stress pad 5 is slowly inserted into the elastic groove 42. A dedicated insertion tool is used to ensure uniform compression into the groove bottom. A layer of high-temperature, durable adhesive is applied to the groove bottom to enhance adhesion between the stress pad 5 and the groove wall, preventing displacement due to vibration or frequent load changes. Once the nut block 2 is installed in the groove, its bottom makes close contact with the top of the stress pad 5. Under load, the stress pad 5 absorbs the load through elastic deformation and evenly distributes it around the base of the thread, effectively reducing the risk of damage caused by localized force concentration.

[0062] Loading tests verified the significant effectiveness of the 1:2 diameter design ratio under multi-directional extrusion loads. Stress Pad 5 achieved an 8% deformation rate under a compressive pressure of 25 MPa while maintaining the material's elastic recovery and exhibiting no permanent deformation. Pressure distribution tests revealed a 30% reduction in peak stress at the threaded connection, significantly improving force uniformity. Furthermore, test results demonstrated that this design can extend mold life by more than 1.5 times while reducing maintenance frequency and production costs.

[0063] In one embodiment, the finish processing of the first male head 4 in S4012 also includes processing the portion where the first male head 4 is connected to the connecting bridge 14 and the core portion 12 into a smooth curved surface. In the actual use scenario of the mold, when the shear force borne by the connecting bridge 14 is large, selecting a larger curvature radius can effectively reduce the local stress value at the connection.

[0064] During machining, a high-precision ball-end milling cutter is used to perform layer-by-layer cutting of the connection area. After machining, the smooth surface is further treated using a surface polishing process to achieve a surface roughness of less than Ra 0.8μm, minimizing the impact of surface defects on mechanical properties. After the smooth surface is machined, 3D scanning is used to verify the curvature continuity of the area and the match between the actual machined dimensions and the designed model, ensuring that the error is controlled within ±0.02mm. The smooth surfaces of the first male connector 4, the connecting bridge 14, and the core not only improve the uniformity of the mold structure but also enhance the mold's fatigue resistance under multi-directional high loads, making it particularly suitable for molds used in complex working conditions. This smooth transition design not only optimizes the mold's mechanical properties but also significantly reduces the risk of premature failure due to machining or design flaws.

[0065] In one embodiment, the shape of the first male head 4 is a gradually decreasing column from the bridge 14 to the nut block 2. In the specific implementation process, the shape of the gradually decreasing column is optimized through mechanical simulation in the design stage. The diameter change of the column is set according to a linear decreasing or nonlinear decreasing mode, wherein the decreasing rate is determined according to the load characteristics of the actual use scenario of the mold. For example, when the diameter of the starting end of the first male head 4 (the end connected to the bridge 14) is 10 mm and the diameter of the ending end (the end connected to the nut block 2) is 8 mm, a linear decreasing design is adopted, and the diameter of the column gradually decreases at a rate of 0.1 mm per millimeter in the length direction. Such a design can make the load more uniform during the transfer from the bridge 14 to the nut block 2, avoiding excessive concentration of local force.

[0066] Furthermore, this cylindrical shape improves the assembly precision of the connection between the first male head 4 and the nut block 2. The smaller diameter of the cylindrical end allows for a tighter fit during the threaded connection, thereby enhancing the stability and resistance to loosening of the threaded connection. Under high-frequency loads, the gradually tapering cylindrical shape exhibits a higher fatigue life, effectively extending the service life of the entire mold.

[0067] Through the design and processing technology in this embodiment, the gradually smaller cylindrical shape not only improves the mechanical properties of the first male head 4, but also significantly improves the stability and reliability of the mold under complex load conditions, providing effective technical support for the long life and high performance of the mold.

[0068] In one embodiment, the vertical overlap between the first male connector 4 and the connecting bridge 14 is at least 8 mm. Specifically, the height of the connecting bridge 14 and the base shape of the first male connector 4 were determined during the design phase through finite element analysis. The setting of at least 8 mm in the overlapping portion is based on the optimization of the multi-directional load characteristics that the mold withstands during actual use. In mechanical simulations, this overlapping length effectively disperses the shear and compressive forces transmitted from the first male connector 4 to the connecting bridge 14, avoiding stress concentration caused by an excessively short connection area.

[0069] In one embodiment, a diverter hole 6 is machined at the center of the upper die male block 1, and the diverter hole 6 is used for being embedded with the screw male block 3. S402 further includes the following steps:

[0070] S4021: Preheating: preheating the screw block 3 and the diverter hole 6;

[0071] S4022: Applying an inlay coating: Applying a layer of inlay coating on the contact surface of the screw block 3 and the diversion hole 6;

[0072] S4023: Heating and mounting: the screw male block 3 coated with the mounting coating and the diversion hole 6 are placed in a heating device for heating treatment;

[0073] S4024: Cooling and solidifying: naturally cooling the inlaid screw head and upper die male head block 1 to solidify the inlaid coating.

[0074] Specifically, when machining the diverter hole 6, a CNC drill is first used to precisely locate the center of the upper die male block 1 and then machine the diverter hole 6 according to the designed dimensions. The diameter and depth of the diverter hole 6 are precisely matched to the specifications of the screw male block 3. The hole wall must be machined to be smooth and flawless to ensure a tight fit during the subsequent mounting process. After machining, the size and shape of the diverter hole 6 are inspected using a 3D detector to ensure that it meets the design requirements and fully matches the screw male block 3.

[0075] Entering step S402, the process of inserting the screw block 3 and the diversion hole 6 includes the following steps:

[0076] S4021: Preheating. First, preheat the screw block 3 and the diverter hole 6 to eliminate the residual stress inside the material and ensure that the dimensions of the two remain stable during the embedding process. The preheating temperature is usually controlled between 200°C and 250°C. The preheating is achieved by infrared heating equipment, and its heating uniformity is monitored by real-time temperature sensors to ensure that the surface and internal temperature of the entire component are consistent, avoiding dimensional changes or deformation caused by uneven thermal expansion.

[0077] S4022: Apply an inlay coating. Apply a special inlay coating on the contact surface of the screw block 3 and the diversion hole 6. The coating material is a high-temperature resistant ceramic-based composite coating with excellent shear strength and wear resistance. It can maintain stable bonding under high load conditions. Automatic spraying equipment is used during the coating process to ensure uniform coating thickness. After coating, the coating surface is slightly heated to achieve initial solidification and enhance adhesion.

[0078] S4023: Heating Mounting

[0079] The threaded block 3 and the manifold 6, coated with the inlay coating, are placed in a heating device for heating. The heating temperature is typically set at 500°C to 550°C for 30 minutes to ensure that the coating material fully blends with the substrate and forms a secure bond. During the heating process, the threaded block and manifold 6 undergo fine-tuning due to thermal expansion, ensuring a tighter fit. The entire heating process is regulated in real time by a temperature monitoring system to ensure a uniform temperature across the inlay area.

[0080] S4024: Cooling and curing. After heating is completed, the embedded screw male block 3 and the upper mold male block 1 are taken out of the heating equipment and placed in a room temperature environment for natural cooling to complete the curing process of the coating. During the cooling process, external force interference is avoided to prevent stress concentration in the embedded area. After cooling, the mechanical properties of the bonding area between the screw male block 3 and the upper mold male block 1 are tested, including shear strength and bonding stability tests. The results show that the bonding strength is significantly improved after the coating is cured, and the bonding force between the screw male block 3 and the diversion hole 6 reaches more than 80% of the original material, and can maintain long-term stability under high-load working conditions.

[0081] In one embodiment, the blank is made of a hard aluminum alloy. It should be noted that hard aluminum alloys are primarily composed of aluminum, supplemented by alloying elements such as zinc, magnesium, and copper. Through heat treatment, they achieve high strength and hardness while maintaining a relatively low density, thereby meeting strength requirements while reducing the overall weight of the mold. The yield strength and tensile strength of hard aluminum alloys are significantly superior to those of ordinary aluminum alloys, effectively preventing deformation and breakage when the mold is subjected to multi-directional extrusion and shear forces. Their wear resistance and excellent thermal conductivity further enhance the stability and durability of the mold in high-frequency, high-temperature environments.

[0082] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A mold male head inlay process, characterized in that: The following steps are involved: S1: Material preparation and cutting: Cut the prepared blank block into sections according to the complexity of the structure according to the structure of the mold, separate the complex parts from the main body, and form at least three rough blank blocks; S2: rough processing of the rough blank: transporting the three rough blanks to corresponding processing equipment for stamping and forging to form preliminary blanks; S3: performing fine processing on the preform blocks: performing fine processing on three preform blocks simultaneously on different processing equipment to form fine blocks; S4: inlaying the three refined blanks: the three refined blanks are an upper die male block, a nut block and a screw male block; S401: Thread assembly of the nut block and the upper die male block: S402: The screw male block and the upper die male block are assembled by hot-inserting; The upper mold male block includes a solid portion and a core portion; a plurality of mold cavities are disposed between the solid portion and the core portion; the mold cavities are provided with connecting bridges and separated by the connecting bridges; one end of the connecting bridge is connected to the solid portion, and the other end is connected to the core portion; S401 further includes the following steps: S4011: Roughly machining a connection between any one of the bridges and the solid portion to form a first male connector; S4012: Finish-machining the first male head to form a first mounting groove at the top center of the first male head. The first mounting groove has threads for threaded connection with the nut block. The blank block is made of hard aluminum alloy. An elastic groove is also provided at the bottom of the first mounting groove. The elastic groove is filled with a stress pad, which abuts against the nut block. A diversion hole is machined at the center of the upper die male block, and the diversion hole is used for being embedded with the screw male block. S402 further includes the following steps: S4021: Preheating, preheating the screw block and diversion hole; S4022: Apply inlay coating, apply a layer of inlay coating on the contact surface of the screw block and the diversion hole; S4023: heating and mounting, placing the screw block coated with the mounting coating and the diversion hole together into a heating device for heating treatment; S4024: Cooling and solidifying: naturally cooling the inlaid screw head and upper die male head block to solidify the inlaid coating.

2. The process for inserting a male head of a mold according to claim 1, characterized in that: The ratio of the diameter of the stress pad to the diameter of the nut block is 1:

2.

3. The male head inlaying process of a mold according to claim 1, characterized in that: The fine processing of the first male head in S4012 also includes processing the portion where the first male head is connected to the connecting bridge and the core portion into a smooth curved surface.

4. The process for inserting a male head of a mold according to claim 1, characterized in that: From the connecting bridge to the nut block, the first male head is shaped like a column that gradually becomes smaller.

5. The process for inserting a male head of a mold according to claim 4, characterized in that: The vertical overlap between the first male connector and the connecting bridge is at least 8 mm.

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