A cold extrusion equipment for lead bricks

Abstract

This invention discloses a lead brick cold extrusion equipment, relating to the field of metal processing. This solution utilizes a cold-pressing die capable of axial displacement and two symmetrical moving components. One of the two end templates contacts the profile and pushes it to the center to achieve cold pressing on both sides. Simultaneously, the closing pressure plate maintains the progressive extrusion of the opposite side templates through the inclined surface of the inclined pressure frame until the horizontal part contacts the inner wall of the chute. As the pressure increases, the ends of the two core plates contact and provide a lateral pressure during extrusion. The boss further presses the side templates, completing a three-stage pressurization process of simultaneous pressure application in two directions. This method results in small cold-pressing collapse displacement of the profile in a single direction and multi-directional one-time forming, maintaining high precision and high production efficiency. It avoids the problem of uneven force on the non-pressure side, ensuring consistent density on both sides in the production of high-precision thick lead bricks, and forming a dovetail shape in both directions, possessing extremely stable shielding performance.

Description

Technical Field

[0001] This invention relates to the field of metal processing, and more particularly to a cold extrusion apparatus for lead bricks. Background Technology

[0002] Lead bricks are widely used as the primary shielding material in nuclear medicine protective facilities, industrial radiation shielding devices, and radiation equipment protective structures. Their attenuation of radiation relies mainly on the high density and atomic number of lead. Therefore, the internal density and overall uniformity of the lead brick directly affect its shielding performance. In actual production, thick lead bricks are typically formed through cold extrusion. This involves placing pre-cut lead profiles into a die extrusion chamber, applying axial pressure using hydraulic equipment to induce plastic flow and form a predetermined shape.

[0003] However, most existing cold-pressing equipment for lead bricks uses unidirectional axial extrusion to complete the molding process. This type of structure relies primarily on unilateral or uniaxial pressure to achieve plastic deformation of the material during compression. In the production of high-thickness lead bricks, because lead is a soft metal with strong plastic flow capacity, it easily generates significant axial flow along the extrusion direction under unidirectional compression conditions. This causes significant longitudinal elongation of the grains within the material, resulting in differences in density distribution in different directions and causing directional deviations in shielding performance. Furthermore, unilateral pressure structures often result in significantly higher pressure on the applied side than on the other side during extrusion, causing the profile to shift during compression and leading to inconsistent densities on both sides.

[0004] Furthermore, in the traditional unidirectional cold pressing process, the material needs to be axially compressed over a relatively long distance to achieve the predetermined thickness. This compression method easily causes overflow or burrs on the edges of the profile, and may also cause friction against the inner wall of the mold during mold movement, thus affecting the surface quality of the product. In order to obtain lead brick products that meet the dimensional accuracy requirements, it is usually necessary to cut or grind the surface after molding, which not only increases the processing steps but also generates a large amount of lead shavings waste.

[0005] Furthermore, after the existing cold pressing mold completes the pressing, it usually ejects the product out of the mold through the bottom ejector rod or top plate structure. This ejection method is prone to forming a local stress area at the bottom of the lead brick. When the lead material has high plasticity, especially when it is just cold pressed, it is easy to produce indentations or surface scratches at the ejection contact position, thus affecting the overall quality of the lead brick. It is also not conducive to the continuous operation of the automated production line.

[0006] Therefore, how to achieve multi-directional synchronous pressure during the cold pressing process of lead bricks, so that the material maintains a stable stress state during compression and reduces the problem of unidirectional grain elongation, while improving the density consistency and surface forming quality of lead bricks, and further achieving stable demolding and automatic discharge, has become a technical problem that urgently needs to be solved in the field of lead brick cold pressing equipment. Summary of the Invention

[0007] The purpose of this invention is to provide a cold extrusion device for lead bricks in order to solve the problems of low quality and low efficiency in traditional lead brick production.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: a lead brick cold extrusion equipment, comprising a cold pressing mold and a cold pressing frame for sliding thereon, and two moving components respectively disposed on both sides of the cold pressing frame to cooperate with the cold pressing mold for extrusion processing. The cold pressing mold includes a mold shell and a mold core slidably disposed therein. The moving components include a cold pressing component that combines direct axial extrusion driven by a hydraulic rod and lateral extrusion by leveraging the mold shell to achieve multi-face synchronous pressure application.

[0009] The cold pressing frame includes ring frames symmetrically arranged on both sides of the cold pressing mold, and telescopic cylinders for driving the axial displacement of the cold pressing mold are installed on the opposite sides of the two ring frames.

[0010] As a further description of the above technical solution: the cold pressing frame also includes two end seats, two long slide rails are fixedly connected through the two end seats and two ring frames, two short slide rails are fixedly connected through the same side end seat and ring frame, two support plates are fixed on each of the two long slide rails, and guide rails that slide through the mold shell are fixedly connected on the two support plates on the same side.

[0011] As a further description of the above technical solution: the mold shell includes a mold body, the mold body is axially provided with an extrusion chamber and two slide grooves, the two slide grooves are symmetrically opened on both sides of the extrusion chamber, and pin seats for connecting telescopic cylinders are fixed on both sides of the mold body.

[0012] As a further description of the above technical solution: the mold core includes two side sealing plates for clamping the profile, and two side templates are symmetrically attached to both sides of the two side sealing plates, and tension springs are fixed to both sides of the two side templates.

[0013] As a further description of the above technical solution: the cold pressing assembly includes a sliding seat and an end template fixed thereon. The end template is symmetrically provided with pressure plates on both sides. The pressure plates are fixed on the sliding seat. The sliding seat is slidably arranged on two long slide rails and two short slide rails on one side.

[0014] As a further description of the above technical solution: the pressing plate includes an inclined pressing frame and an integrally formed core plate therein. When the pressing plate is inserted into the slide groove, the inclined pressing frame adheres to its inner wall and gradually squeezes the mold core for initial cold pressing. When the two core plates come into contact, the opposing pressure is transformed into lateral pressure and the pressure continues to increase.

[0015] As a further description of the above technical solution: the inclined pressure frame includes a frame body, the inner wall of the frame body is provided with a groove for small deformation of the core plate, the bottom of the frame body is provided with a horizontal part that completely fits the slide groove, and an inclined part on one side of the horizontal part for gradually applying pressure to the mold core.

[0016] As a further description of the above technical solution: the core plate includes a plate body disposed on the inner wall of the groove, the plate body having a boss, and a stress-relieving head fixed to the end of the plate body, the stress-relieving head being disposed in a downwardly inclined shape.

[0017] As a further description of the above technical solution: the length of the end template and the closing pressure plate on the right side is greater than that of the end template and the closing pressure plate on the left side.

[0018] As a further description of the above technical solution: the action component includes a mounting base for through-mounting of the hydraulic rod, and support columns are fixed at the four corners of both mounting bases.

[0019] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0020] This solution utilizes a cold-pressing mold with axial displacement and two symmetrical moving components. During use, the profile is pre-placed into the mold core, with the two side templates holding it stably. The moving components then push the cold-pressing components via hydraulic rods, causing the end templates of the cold-pressing components to move until one end template contacts the profile and pushes it to the center, achieving cold pressing from both sides. Simultaneously, the pressure plate maintains the step-by-step compression of the side templates through the inclined surface of the inclined pressure frame. During this process, the tension spring contracts until the horizontal part contacts the inner wall of the chute. As the pressure increases, the ends of the two core plates contact and provide lateral pressure during pressing. The boss further presses the side templates, completing the three-stage pressing process of simultaneous pressure application in two directions. This method results in small cold-pressing collapse displacement of the profile in one direction and multi-directional one-time forming, maintaining high precision and high production efficiency. It avoids uneven force on the non-pressure side, ensuring consistent density on both sides in the production of high-precision thick lead bricks, and forming a dovetail shape in both directions, providing extremely stable shielding performance.

[0021] At the same time, the direct pressure of the axial hydraulic rod, combined with the lateral pressure of the side template and the support of the side sealing plate, forms a three-dimensional compression profile that can significantly reduce the longitudinal grain elongation of soft metals such as lead during the extrusion process, making the radiation attenuation coefficient of lead bricks tend to be consistent in all directions.

[0022] Traditional unidirectional pressure has a large compression deformation length and the pressure on the pressure side is greater than that on the other side, which makes it easy for burrs to appear on the pressure side during cold pressing. This solution avoids this problem by applying pressure simultaneously from multiple angles through a centering method. It ensures quality, eliminates the need for post-processing of the surface, improves production efficiency, and eliminates processing waste.

[0023] When this solution is used, the coordinated operation of two telescopic cylinders can move the cold pressing mold, so that the moving components on both sides can maintain the clamping state of the profile after the pressure is reduced, and then slide out of the cold pressing mold. After the two moving components separate, the profile can be automatically discharged. This method, through the stable displacement of the mold and the clamping method on both sides of the end, makes its demolding stability higher. The ejection is achieved by the completely conforming end templates on both sides, avoiding the scratches on the surface of the traditional ejection structure. At the same time, it has a stable clamping and suspension design that facilitates the gripping and unloading of the robotic arm. Attached Figure Description

[0024] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0025] Figure 2 This is a partial three-dimensional schematic diagram of the present invention;

[0026] Figure 3 This is an exploded view of the cold pressing mold of the present invention;

[0027] Figure 4 This is a schematic cross-sectional view of the cold pressing mold and two cold pressing components of the present invention in the cold pressing state;

[0028] Figure 5 This is an exploded view of the mold core of the present invention;

[0029] Figure 6 This is a side view of the cold pressing mold and a single cold pressing component of the present invention in the cold pressing state;

[0030] Figure 7 This is a three-dimensional schematic diagram of the pressing plate of the present invention;

[0031] Figure 8 This is a schematic diagram of the front view (cold-pressed state) of the present invention;

[0032] Figure 9 This is a schematic diagram of the main view (discharge state) of the present invention;

[0033] Figure 10This is a schematic diagram of the main view (loading state) of the present invention.

[0034] Legend:

[0035] 1. Cold pressing mold; 11. Mold shell; 111. Mold body; 112. Extrusion chamber; 113. Slide groove; 114. Pin seat; 12. Mold core; 121. Side sealing plate; 122. Side template; 123. Tension spring;

[0036] 2. Cold pressing frame; 21. End seat; 22. Long slide rail; 23. Short slide rail; 24. Ring frame; 25. Support plate; 26. Guide rail; 27. Telescopic cylinder;

[0037] 3. Moving assembly; 31. Mounting base; 32. Hydraulic rod; 33. Cold pressing assembly; 331. Sliding seat; 332. End template; 333. Pressing plate; 301. Inclined pressure frame; 101. Frame body; 102. Groove; 103. Horizontal section; 104. Inclined section; 302. Core plate; 201. Plate body; 202. Boss; 203. Unloading head;

[0038] 4. Support column; 5. Profile. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] like Figure 1 - Figure 10 As shown, the present invention provides a lead brick cold extrusion equipment, including a cold pressing mold 1 and a cold pressing frame 2 for sliding thereon, and two moving components 3 respectively disposed on both sides of the cold pressing frame 2 to cooperate with the cold pressing mold 1 for extrusion processing. The cold pressing mold 1 includes a mold shell 11 and a mold core 12 slidably disposed therein. The moving components 3 include a cold pressing component 33 that combines direct axial extrusion driven by a hydraulic rod 32 with lateral extrusion by the mold shell 11 to achieve multi-face synchronous pressure application.

[0041] The cold pressing frame 2 includes ring frames 24 symmetrically arranged on both sides of the cold pressing mold 1, and telescopic cylinders 27 for driving the axial displacement of the cold pressing mold 1 are installed on the opposite sides of the two ring frames 24.

[0042] This scheme forms a centered extrusion structure by symmetrically arranged action components 3 and axially displaceable cold pressing mold 1. During the cold pressing process, the end template 332 provides axial opposing pressure, while the closing pressure plate 333 forms a step-by-step lateral compression through the cooperation of the inclined pressure frame 301, core plate 302 and side template 122. This allows the profile 5 to go through three stages in sequence during the cold pressing stage: pre-pressing, synchronous extrusion and fine pressing, thereby constructing a multi-dimensional compression state with axial and lateral synergistic effects.

[0043] This structure can significantly shorten the compression and collapse displacement of profile 5 in a single direction, enabling the material to be formed in one step under the synchronous action of multiple directions, thereby improving the dimensional accuracy of the product and reducing the probability of material flow deviation. At the same time, the three-dimensional compression environment formed by axial pressure, lateral extrusion and the support of side sealing plate 121 can effectively suppress the longitudinal grain elongation phenomenon of lead material during cold extrusion, making the internal structure of lead bricks more uniform and making the radiation attenuation performance in all directions more consistent.

[0044] Building upon this, the center-pressure structure avoids the force differential issues caused by traditional unilateral pressure, thereby reducing the probability of burr formation and minimizing subsequent finishing processes, thus improving production efficiency. Furthermore, the axial movement of the cold-pressing mold 1, coupled with the clamping action of the end template 332, achieves stable demolding, ensuring the product maintains a stable stress state during mold exit, avoiding surface indentations caused by the ejection structure, and creating a suspended state for easy unloading, thus providing excellent adaptability to automated production.

[0045] Specifically, such as Figure 2 As shown, the cold pressing frame 2 also includes two end seats 21. Two long slide rails 22 are fixedly connected through the two end seats 21 and the two ring frames 24. Two short slide rails 23 are fixedly connected through the end seats 21 and the ring frames 24 on the same side. Two support plates 25 are fixed on each of the two long slide rails 22, and guide rails 26 that slide through the mold shell 11 are fixedly connected on the two support plates 25 on the same side.

[0046] The two short slide rails 23 and the long slide rail 22 form a mutually cooperating guide structure, which enables the cold pressing assembly 33 to form a multi-point support guide state during the movement, thereby improving the movement stability and ensuring the highest stability during the cold pressing process with high pressure.

[0047] The guide rail 26 is arranged along the moving direction of the die shell 11 and slides through the die shell 11, so that the die shell 11 maintains a stable motion state during the movement and ensures that the extrusion structure maintains accurate alignment during the operation.

[0048] Specifically, such as Figure 3As shown, the mold shell 11 includes a mold body 111. The mold body 111 has an axially formed extrusion chamber 112 and two slide grooves 113. The two slide grooves 113 are symmetrically formed on both sides of the extrusion chamber 112. Pin seats 114 for connecting telescopic cylinders 27 are fixed on both sides of the mold body 111.

[0049] The mold body 111 has two axial grooves 113. The two grooves 113 extend along the axial direction of the extrusion chamber 112 and are symmetrically opened on both sides of the extrusion chamber 112. The two grooves 113 are used for inserting the pressure plate 333 to form a lateral extrusion structure, so that the lateral pressure can act on the two side templates 122 of the mold core 12 structure.

[0050] Both sides of the mold body 111 are fixed with pin seats 114 for connecting telescopic cylinders 27. The pin seats 114 are movably connected to the output end of the telescopic cylinders 27 through pin shafts, so that the telescopic cylinders 27 can drive the mold shell 11 to move axially along the guide rail 26 during the telescopic process, thereby realizing the reciprocating movement of the mold shell 11 on the cold pressing frame 2.

[0051] Specifically, such as Figure 5 As shown, the mold core 12 includes two side sealing plates 121 that hold the profile 5, and two side templates 122 are symmetrically attached to both sides of the two side sealing plates 121. Tension springs 123 are fixed to both sides of the two side templates 122.

[0052] Two side sealing plates 121 are located inside the extrusion chamber 112 and are arranged parallel to each other. A clamping space for placing the profile 5 is formed between the two side sealing plates 121, allowing the profile 5 to be confined to a predetermined position after entering the mold core 12. Two side templates 122 are symmetrically attached to both sides of the two side sealing plates 121. The side templates 122 can move along the sides of the side sealing plates 121, thereby applying pressure to the sidewalls of the profile 5 during extrusion. Furthermore, tension springs 123 are fixed to both sides of the two side templates 122. One end of the tension spring 123 is fixed to the side template 122, and the other end is fixed to the inner wall of the mold body 111, keeping the side templates 122 in an inward clamping state when not under pressure. This automatically clamps the profile 5 and stabilizes its position during the feeding stage.

[0053] Specifically, such as Figure 3 As shown, the cold pressing assembly 33 includes a sliding seat 331 and an end template 332 fixed thereon. The end template 332 is symmetrically provided with pressing plates 333 on both sides. The pressing plates 333 are fixed on the sliding seat 331. The sliding seat 331 is slidably arranged on two long slide rails 22 and two short slide rails 23 on one side.

[0054] The sliding seat 331 is an integral load-bearing structure and is used to install the end template 332 and the pressing plate 333. The end template 332 is located at the front end of the sliding seat 331 and is used to apply axial extrusion force to the end face of the profile 5. The pressing plates 333 are symmetrically arranged on both sides of the end template 332. The pressing plates 333 and the end template 332 form an integral extrusion structure, so that the axial pressure and the lateral pressure can act on the mold core 12 structure at the same time.

[0055] The sliding seat 331 is slidably mounted on two long slide rails 22 and two short slide rails 23 on one side, so that the cold pressing assembly 33 can move stably along the slide rail direction under hydraulic drive, while maintaining accurate alignment between the extrusion structure and the mold shell 11.

[0056] Specifically, such as Figure 4 As shown, the pressing plate 333 includes a slanted pressing frame 301 and an integrally formed core plate 302 therein. When the pressing plate 333 is inserted into the slide groove 113, the slanted pressing frame 301 adheres to its inner wall and gradually squeezes the mold core 12 for initial cold pressing. When the two core plates 302 come into contact, the opposing pressure is converted into lateral pressure and the pressure continues to increase.

[0057] The inclined pressure frame 301 is an integral support structure used to form a mating contact with the inner wall of the slide groove 113. When the pressing plate 333 is inserted into the slide groove 113, the inclined pressure frame 301 first adheres to the inner wall of the slide groove 113 through its inclined surface 104 and gradually moves inward, thereby generating progressive extrusion on the mold core 12 structure, causing the side template 122 to gradually approach the side wall of the profile 5 and form the initial cold pressing stage. After the ends of the two core plates 302 contact, the two core plates 302 form a mutually supporting state during the continued extrusion process, so that the originally opposing axial pressure is converted into lateral pressure and the pressure continues to increase, thereby further pushing the side template 122 to apply high pressure to the side wall of the profile 5, realizing the lateral fine pressing process.

[0058] Specifically, such as Figure 7 As shown, the inclined pressure frame 301 includes a frame body 101. The inner wall of the frame body 101 is provided with a groove 102 for small deformation of the core plate 302. The bottom of the frame body 101 is provided with a horizontal part 103 that fully fits the slide groove 113, and an inclined part 104 on one side of the horizontal part 103 for gradually applying pressure to the mold core 12.

[0059] A sloping part 104 is provided on one side of the horizontal part 103 for gradually applying pressure to the mold core 12. The sloping part 104 gradually tilts inward along the extrusion direction and gradually pushes the mold core 12 structure to produce lateral displacement during the process of entering the slide groove 113, thereby forming a compression process of applying pressure step by step until the horizontal part 103 completely fits the inner wall of the slide groove 113, completing the initial lateral extrusion.

[0060] The frame 101 is an integral metal structure with high compressive strength. The inner wall of the frame 101 is provided with a groove 102 for the core plate 302 to deform slightly, which provides a small elastic deformation space for the core plate 302, so that the core plate 302 can produce a small displacement during the high pressure stage. After the initial lateral extrusion is completed (i.e., the horizontal part 103 contacts the inner wall of the slide groove 113), the two core plates 302 contact each other on opposite sides and are extruded.

[0061] Specifically, such as Figure 7 As shown, the core plate 302 includes a plate body 201 disposed on the inner wall of the groove 102, a boss 202 disposed on the plate body 201, and a stress relief head 203 fixed to the end of the plate body 201, the stress relief head 203 being disposed in a downwardly inclined shape.

[0062] The plate 201 is arranged longitudinally inside the inclined pressure frame 301 and serves as the main load-bearing structure to transmit pressure to the side template 122. The pressure is then directly applied to the side template 122 through the boss 202, causing the side template 122 to generate a higher intensity of lateral compression displacement.

[0063] The stress relief head 203 is arranged in a downward angle, so that after the core plate 302 reaches the maximum compression state, the local pressure can be dispersed through the inclined surface of the stress relief head 203, thereby reducing the stress concentration at the end of the core plate 302 and improving the structural durability, and converting the pressure into lateral pressure.

[0064] Specifically, such as Figure 4 As shown, the length of the end template 332 and the pressure plate 333 on the right side is greater than that of the end template 332 and the pressure plate 333 on the left side.

[0065] The extended end template 332 and the closing pressure plate 333 on the right side can accommodate the horizontal displacement requirements of the cold pressing mold 1, combined with Figure 8 It can be seen that, under cold pressing conditions, the shorter end template 332 and pressure plate 333 on the left side are less exposed than the end template 332 and pressure plate 333 on the right side. After cold pressing, the two telescopic cylinders 27, with one extending and the other shortening, can push the cold pressing mold 1 to the right and make it slide on the extended end template 332 and pressure plate 333 on the right side until the cold-pressed profile 5 is fully exposed. Then, the end template 332 and pressure plate 333 on the left side are displaced under the drive of the hydraulic rod 32, so as to realize the unloading (combined with...). Figure 9 As shown), in this state, the extended end template 332 on the right and the closing pressure plate 333 retract under the action of the hydraulic rod 32, which facilitates material loading (as shown). Figure 10 As shown in the figure, after the feeding robot arm pushes the profile 5 into the mold core 12, the extended end template 332 on its right side blocks and positions it until the two side templates 122 elastically clamp the profile 5.

[0066] Specifically, such as Figure 1 As shown, the action component 3 includes a mounting base 31 for through-mounting of the hydraulic rod 32, and support columns 4 are fixed at the four corners of the two mounting bases 31.

[0067] The support column 4 and the two mounting bases 31 form the overall external support frame of the device, providing its main structural support.

[0068] When in use, it is preferred to use a robotic arm for automatic feeding. The robotic arm moves the quantitatively cut profile 5 to the opening on one side of the mold core 12, and pushes the profile 5 to the middle of the mold core 12 through the pushing structure (such as a cylinder) on the robotic arm and squeezes the two side templates 122 away. At the same time, the tension spring 123 is stretched to hold the profile 5 to prevent large displacement, so as to pre-place the profile 5 into the mold core 12 of the cold pressing mold 1.

[0069] The two moving components 3 on both sides push the sliding seat 331 of the cold pressing component 33 to slide on two long slide rails 22 and two short slide rails 23 on one side through the hydraulic rod 32 until one of the two end templates 332 contacts the profile 5 and pushes it to the center to achieve cold pressing on both sides. At the same time, the closing pressure plate 333 maintains the step-by-step compression of the opposite template 122 through the inclined part 104 of the inclined pressure frame 301. During this process, the tension spring 123 contracts until the horizontal part 103 contacts the inner wall of the slide groove 113 to complete the pre-compression of the side of the profile 5. As the pressure increases, the unloading heads 203 at the ends of the two core plates 302 contact and squeeze. The extrusion pressure is guided to shift laterally, causing the plate 201 to bend slightly due to strain. The boss 202 further presses the side template 122, allowing the side template 122 to complete lateral precision pressing with a smaller amplitude but greater pressure. This completes the cold pressing forming with simultaneous force applied in two opposite directions. This method results in small displacement of the profile 5 and multi-directional one-time forming, with high precision and high production efficiency. The cooperation of the two hydraulic rods 32 avoids the problem of uneven force on the non-pressure side, ensuring the consistency of density on both sides in the production of thick lead bricks. Furthermore, since both extrusion directions are bidirectional, it can ensure high product quality.

[0070] At the same time, the direct pressure of the axial hydraulic rod 32, combined with the lateral pressure of the side template 122 and the support of the side sealing plate 121, forms a three-dimensional compression profile 5 that can significantly reduce the longitudinal grain elongation of soft metals such as lead during the extrusion process, making the radiation attenuation coefficient of the lead brick tend to be consistent in all directions.

[0071] Traditional unidirectional pressure application results in a large compression deformation length and greater pressure on the applied side than on the other side, making it prone to burrs during cold pressing. This solution applies pressure synchronously from multiple angles by centering, reducing excessive pressure in one direction and thus avoiding the occurrence of burrs.

[0072] When this solution is used, the cold pressing mold 1 can be moved by the coordinated operation of two telescopic cylinders 27, so that the moving components 3 on both sides can maintain the clamping state of the profile 5 after the pressure is reduced, and the cold pressing mold 1 can be slid out. After the two moving components 3 separate, the profile 5 can be automatically discharged.

[0073] Based on the above, it can be seen that the profile 5 (two-way dovetail lead brick) processed by the scheme has significant advantages such as high processing efficiency, reliable product quality, and no need for post-processing of the shape.

[0074] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A cold extrusion apparatus for lead bricks, comprising a cold pressing die (1) and a cold pressing frame (2) for sliding thereon, and two moving components (3) respectively disposed on both sides of the cold pressing frame (2) to cooperate with the cold pressing die (1) for extrusion processing, characterized in that: The cold pressing mold (1) includes a mold shell (11) and a mold core (12) that is slidably disposed therein. The moving component (3) includes a cold pressing component (33) that combines direct axial extrusion driven by a hydraulic rod (32) and lateral extrusion by the mold shell (11) to achieve multi-face synchronous pressure application. The cold pressing frame (2) includes ring frames (24) symmetrically arranged on both sides of the cold pressing mold (1), and telescopic cylinders (27) for driving the cold pressing mold (1) to move axially are installed on the opposite sides of the two ring frames (24). The mold shell (11) includes a mold body (111), which has an axially formed extrusion chamber (112) and two slides (113). The two slides (113) are symmetrically opened on both sides of the extrusion chamber (112). Pins (114) for connecting telescopic cylinders (27) are fixed on both sides of the mold body (111). The mold core (12) includes two side sealing plates (121) for clamping the profile (5), and two side templates (122) are symmetrically attached to both sides of the two side sealing plates (121), and tension springs (123) are fixed on both sides of the two side templates (122). The cold pressing assembly (33) includes a sliding seat (331) and an end template (332) fixed thereon. The end template (332) is symmetrically provided with pressing plates (333) on both sides. The pressing plates (333) are fixed on the sliding seat (331). The sliding seat (331) is slidably arranged on two long slide rails (22) and two short slide rails (23) on one side. The pressing plate (333) includes a slanted pressing frame (301) and an integrally formed core plate (302) therein. When the pressing plate (333) is inserted into the slide groove (113), the slanted pressing frame (301) adheres to its inner wall and gradually squeezes the mold core (12) for initial cold pressing. When the two core plates (302) come into contact, the opposing pressure is transformed into lateral pressure and the pressure continues to increase. The inclined pressure frame (301) includes a frame body (101), the inner wall of the frame body (101) is provided with a groove (102) for small deformation of the core plate (302), the bottom of the frame body (101) is provided with a horizontal part (103) that fully fits the slide groove (113), and an inclined part (104) on one side of the horizontal part (103) for gradually applying pressure to the mold core (12). The core plate (302) includes a plate body (201) located on the inner wall of the groove (102), a boss (202) is provided on the plate body (201), and a stress relief head (203) is fixed at the end of the plate body (201), the stress relief head (203) is arranged in a downward inclined shape.

2. The lead brick cold extrusion equipment according to claim 1, characterized in that, The cold pressing frame (2) also includes two end seats (21), two long slide rails (22) are fixedly connected through the two end seats (21) and the two ring frames (24), two short slide rails (23) are fixedly connected through the end seats (21) and the ring frames (24) on the same side, two support plates (25) are fixed on each of the two long slide rails (22), and guide rails (26) that slide through the mold shell (11) are fixedly connected on the two support plates (25) on the same side.

3. The lead brick cold extrusion equipment according to claim 1, characterized in that, The length of the end template (332) and the pressure plate (333) on the right side is greater than that of the end template (332) and the pressure plate (333) on the left side.

4. The lead brick cold extrusion equipment according to claim 1, characterized in that, The action component (3) includes a mounting base (31) for through mounting of the hydraulic rod (32), and each of the four corners of the two mounting bases (31) is fixed with a support column (4).

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