An optical module housing and fin integrated die-casting structure

Abstract

This invention discloses an integrated die-casting structure for an optical module housing and heat sink, belonging to the field of die-casting mold technology. It includes a fixed mold, a moving mold, an inner mold body, an outer mold body, a flow-cutting component, and a stripping component. The fixed mold has a mold groove, within which the inner mold bodies are arranged in an array. Reinforcing rib grooves are provided on both sides of the inner mold bodies. The moving mold correspondingly has an outer mold body, with heat sink grooves on both sides of the outer mold body. After mold closing, the inner and outer mold bodies enclose to form an integrated die-casting cavity for the optical module housing with reinforcing ribs and heat sink. A guide cavity connecting each die-casting cavity is provided within the mold groove, and a flow-cutting groove is provided at the confluence point. An expansion groove is provided at the bottom of the outer mold body, housing a flow-cutting component that matches the flow-cutting groove. This invention achieves integrated die-casting of the optical module housing and heat sink, featuring controllable material injection, automatic flow-cutting, smooth residual material cleaning, stable demolding, and good cavity venting, improving product molding accuracy and die-casting production efficiency. It is suitable for mass production of optical module housings.

Description

Technical Field

[0001] This invention relates to the field of die-casting mold technology, specifically to an integrated die-casting structure of an optical module housing and a heat sink. Background Technology

[0002] Optical modules are the core components of optical communication equipment. Their housings not only provide structural protection and installation fixation, but also need to have good heat dissipation performance. Therefore, conventional optical module housings typically integrate an integrated heat sink structure on the outside. Currently, the traditional production method in the industry mostly involves die-casting the housing and then welding and assembling it to add the heat sink. This process is cumbersome, has low assembly precision, high thermal resistance, high production costs, and long production cycles.

[0003] Existing integrated die-casting molds have the following technical defects when producing optical module housings with heat sinks: First, during multi-cavity array die casting, uneven material flow rates in each cavity can easily lead to defects such as material shortages, shrinkage cavities, and incomplete molding. Second, after die casting, residual molten material inside the guide cavity cannot be cleaned in time, easily causing waste material adhesion and affecting subsequent mold closing and die casting. Third, poor venting of the mold cavity can easily lead to air bubbles inside the product after die casting, reducing structural strength. Fourth, uneven demolding force can easily cause deformation and breakage of the thin-walled structure of the heat sink, resulting in a low yield rate. Fifth, the lack of an automatic flow-cutting structure makes it easy for the melt to flow back after the injection stops, resulting in insufficient cavity filling and product dimensional deviations.

[0004] To address the shortcomings of the existing technologies, there is an urgent need to design an integrated die-casting structure for the optical module housing and heat sink that is structurally sound, capable of automatic flow interception, automatic cleaning of excess material, smooth venting, and stable demolding. This structure would enable one-time die-casting, simplifying the production process and improving product precision and production efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide an integrated die-cast structure for optical module housing and heat sink, which solves the problems of low efficiency in separate assembly of optical module housing and heat sink, uneven feeding in integrated die casting, lack of automatic interception, difficulty in cleaning up residual material, poor venting and demolding effect, and easy deformation and scrapping of products in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an integrated die-casting structure for an optical module housing and a heat sink, comprising a fixed mold, a moving mold, an inner body, an outer body, a flow interception component, and a material stripping component.

[0007] The fixed mold has a mold groove on its end face facing the moving mold. Several inner mold bodies are arrayed within the mold groove. Each inner mold body has integrated reinforcing rib grooves on both sides for die-casting to reinforce the shell structure and enhance its strength. The moving mold has outer mold bodies on its end face facing the fixed mold, each corresponding to one of the inner mold bodies. Each outer mold body has a row of heat sink grooves on both sides for forming an integrated heat sink structure. After the fixed and moving molds are closed, the inner and outer mold bodies are precisely aligned and enclosed, forming a die-casting cavity with a reinforcing rib structure and an integrated shell and heat sink, achieving one-time die-casting without subsequent assembly or welding.

[0008] The mold cavity is equipped with a material guiding chamber, which connects with the array of die-casting cavities to achieve single-point feeding and uniform flow distribution across multiple cavities. A flow-stopping groove is located at the confluence of the material guiding chamber and the die-casting cavities to control the flow. An expansion groove is located at the bottom of the outer mold body, inside which a flow-stopping component matching the flow-stopping groove is installed. Utilizing mechanical elasticity combined with pneumatic linkage, the material is guided during injection and automatically stopped after molding, while also cleaning residual molten material from the material guiding chamber.

[0009] The expansion groove is divided into two independent cavities: an air chamber and a limiting chamber. An ejection air channel is opened inside the moving mold and is connected to the air chamber. A second air inlet and a feed port are set on the outer end face of the moving mold. The second air inlet is connected to an external air supply device and is connected to the ejection air channel. The feed port is connected to the die casting molten material pouring system and is connected to the material guiding cavity, so as to realize independent zoning of molten material feeding and air pressure control.

[0010] The flow-blocking assembly includes a flow-blocking block, an air plug, a first spring, and a flow-restricting component. The flow-blocking block is slidably mounted in the limiting chamber and can move axially along the telescopic groove. The air plug is limited and installed in the air chamber. One end of the flow-blocking block has a protrusion that can extend out of the limiting chamber and insert into the flow-blocking groove to block and cut off the flow. The bottom of the protrusion has a first inclined surface, which facilitates the molten material pressure to drive the flow-blocking block to retract and open the flow channel. The other end of the flow-blocking block has an integrally formed guide post. The flow-blocking block and the guide post are connected to form an air-guiding chamber. The inlet of the air-guiding chamber is connected to the air chamber, and the outlet is located on the first inclined surface, forming a controllable airflow channel.

[0011] Both the air plug and the first spring are mounted on the outside of the guide post. The air plug adopts a conical structure to adapt to the sealing of the air chamber cavity. A stepped groove is opened on the end face of the air plug. The air plug is quickly assembled and positioned by passing through the stepped groove with an internal hex bolt and locking it with the thread of the guide post. The two ends of the first spring abut against the throttling block and the air plug respectively. Under normal conditions, the spring force pushes the protruding part of the throttling block into the throttling groove to keep the throttling closed. When the material is injected, the molten material impacts the first inclined surface, generating an axial thrust to compress the first spring, which drives the throttling block to retract, and the throttling groove is opened. The molten material flows into each die-casting cavity through the material guide cavity to complete the filling.

[0012] The flow-blocking component consists of a flow-blocking block, a cover plate, and a second spring. A vertical mounting groove is formed on the flow-blocking block, which slides vertically within it. A second inclined surface is provided at the bottom of the flow-blocking block. The cover plate is fixed to the top of the flow-blocking block with screws. A positioning groove is formed at the bottom of the cover plate, and the second spring is placed within the positioning groove, with its two ends abutting against the flow-blocking block and the cover plate, respectively. Under normal conditions, the second spring pushes the flow-blocking block downwards, blocking the outlet of the air guide cavity to prevent molten material from seeping into the air guide cavity and causing blockage. After the injection molding is completed, the feeding stops, and the first spring pushes the flow-blocking block back to its original position, with the protrusion re-sealing the flow-blocking groove to achieve automatic flow blocking. At this time, air is supplied to the ejector air passage through the second air inlet. After the airflow enters the air chamber, it acts on the second inclined surface of the flow-blocking block, generating an upward force that pushes the flow-blocking block to compress the second spring and retract, opening the air guide cavity. The airflow rushes into the material guide cavity through the air guide cavity, blowing out and cleaning the residual molten material in the material guide cavity, preventing the remaining material from solidifying and sticking to the mold.

[0013] The inner mold body has a first stripper hole and a second stripper hole. The first stripper hole is located at the center of the inner mold body, corresponding to the center demolding point of the shell body. The second stripper hole is located near the reinforcing rib groove, corresponding to the demolding point of the thin-walled area of ​​the heat sink and reinforcing rib, achieving multi-point balanced demolding. The stripping assembly consists of a stripper plate, a first ejector pin, and a second ejector pin. The first and second ejector pins are fixed to the stripper plate and coaxially matched with the first and second stripper holes, respectively. During demolding, the two ejector pins eject synchronously, dispersing the demolding stress and preventing deformation and breakage of the thin-walled structure of the heat sink. Both the first and second ejector pins have vacuum channels for evacuating air after mold closing and before filling, eliminating back pressure in the die-casting cavity and preventing gas from being trapped by the melt. One end of the vacuum channel has a micro-slit air inlet that communicates with the internal space of the die-casting cavity, and the other end extends to the rear side of the stripper plate. The stripper plate has a pre-set converging and distributing air channel that connects to an external vacuum pump. The ejector pin's outer wall and the stripper hole are precisely fitted with a small clearance and a sealing ring, ensuring smooth sliding while achieving gap sealing and preventing air leakage and pressure drop during vacuuming. Vacuum evacuation logic: After the mold is fully closed and locked, but before the molten metal begins filling, an external vacuum pump is activated. Through the air collection channel of the stripper plate and the vacuum evacuation channel inside the ejector pin, negative pressure is applied to the sealed die-casting cavity, quickly removing trapped air, moisture, and volatile gases. This significantly reduces the internal air pressure and eliminates back pressure during molten metal filling, allowing for smooth laminar flow of the subsequent molten metal filling. This prevents gas from being trapped within the melt, fundamentally eliminating defects such as porosity, shrinkage, and air bubbles in the casting, and improving product density and appearance quality. Vacuuming stops after die-casting filling and during the molten metal solidification stage. The ejector pin ejects synchronously during mold opening and demolding, without affecting normal demolding operations.

[0014] A venting channel is provided near the edge corner of the mold groove, and an exhaust hole is provided in the venting channel. A first air inlet is provided at the bottom of the fixed mold, which connects the mold groove and the venting channel. During the die casting molding process, the gas inside the cavity can enter the venting channel through the gap and be discharged through the exhaust hole. At the same time, a low-pressure airflow can be introduced through the first air inlet to assist the mold parting and the product leaving the cavity, further improving the smoothness of demolding.

[0015] Compared with related technologies, the integrated die-cast structure of optical module housing and heat sink provided by the present invention has the following advantages:

[0016] 1. This invention uses the inner and outer shapes to form a one-time die-cast integral structure of the optical module housing and heat sink, eliminating the need for subsequent welding and assembly processes, reducing production costs, minimizing assembly errors, reducing thermal resistance, and improving heat dissipation performance.

[0017] 2. The present invention is equipped with a flow-stopping component, which uses the linkage between the molten material pressure and the spring elasticity to realize automatic flow control during injection and automatic flow-stopping when material is stopped, thereby avoiding molten material backflow and material shortage in the cavity, ensuring uniform material feeding in each cavity, and improving product size consistency.

[0018] 3. This invention adopts a pneumatic linkage flow obstruction structure, which can automatically open the air guide cavity after die casting and use high-pressure airflow to clean the residual molten material in the guide cavity, preventing the residual material from solidifying and sticking to the mold. No manual cleaning is required, which improves the efficiency of continuous die casting production.

[0019] 4. The present invention features a central and side double ejection hole and a matching double ejector pin ejection assembly to disperse demolding stress, achieve stable ejection for thin-walled heat sink structures, effectively avoid product deformation and cracking, and improve product yield.

[0020] 5. The present invention is equipped with a venting channel, an exhaust port and a first air inlet, which can naturally exhaust air and assist in air intake for parting, eliminate bubble defects in the die-casting cavity, and improve the internal structure density and structural strength of the product.

[0021] 6. The present invention integrates vacuum channels inside the first and second ejector pins, and pre-vacuuming is performed after mold closing and before filling to expel air from the cavity, eliminate back pressure during filling, avoid gas encapsulation in the melt, significantly reduce porosity and shrinkage defects in castings, and improve the density and structural strength of the product.

[0022] 7. The present invention adopts an array-type multi-cavity layout, and the interception component is integrated inside the outer body, which does not require additional mold space. The structure is compact and suitable for mass die-casting production of optical module housings. Attached Figure Description

[0023] Figure 1 This is a three-dimensional schematic diagram of the integrated die-cast structure of optical module housing and heat sink proposed in this invention in the mold-closed state;

[0024] Figure 2 This is a three-dimensional schematic diagram from another perspective of the die-cast structure integrating the optical module housing and heat sink proposed in this invention, in the mold-closed state.

[0025] Figure 3 This is a front view of the integrated die-cast structure of optical module housing and heat sink proposed in this invention in the mold-closed state;

[0026] Figure 4 for Figure 3 Schematic diagram of cross section in the middle AA direction;

[0027] Figure 5 for Figure 3 Schematic diagram of cross section in the middle BB direction;

[0028] Figure 6 This is a three-dimensional schematic diagram of the integrated die-cast structure of optical module housing and heat sink proposed in this invention in the mold opening state;

[0029] Figure 7 This is a three-dimensional schematic diagram from another perspective of the mold-opening state of an integrated die-cast structure for an optical module housing and a heat sink proposed in this invention.

[0030] Figure 8 This is a three-dimensional schematic diagram of the internal shape proposed in this invention;

[0031] Figure 9 This is a three-dimensional schematic diagram of the external shape proposed in this invention;

[0032] Figure 10 This is a three-dimensional half-sectional schematic diagram of the external shape proposed in this invention;

[0033] Figure 11 This is a three-dimensional schematic diagram of the flow interception component proposed in this invention;

[0034] Figure 12 This is an exploded perspective view of the flow-blocking component proposed in this invention;

[0035] Figure 13 This is a half-sectional schematic diagram of the flow-blocking block proposed in this invention.

[0036] In the diagram: 1. Fixed mold; 11. Mold groove; 12. Demolding air passage; 13. First air inlet; 14. Air outlet; 15. Material guide cavity; 2. Moving mold; 21. Material inlet; 22. Second air inlet; 3. Inner body; 31. Flow interception groove; 32. Reinforcing rib groove; 33. First ejection hole; 34. Second ejection hole; 4. Outer body; 41. Heat sink groove; 42. Telescopic groove; 421. Air chamber; 422. Limiting chamber; 43. Unloading air passage; 5. Flow interception assembly 51. Flow-blocking block; 511. Protrusion; 512. First inclined surface; 513. Guide post; 514. Air guide cavity; 515. Mounting groove; 52. Air plug; 521. Step groove; 522. Socket head bolt; 53. First spring; 54. Flow-blocking component; 541. Flow-blocking block; 542. Second inclined surface; 543. Cover plate; 544. Positioning groove; 545. Second spring; 6. Unloading assembly; 61. Unloading plate; 62. First ejector pin; 63. Second ejector pin. Detailed Implementation

[0037] The present invention will be further described in detail below with reference to specific embodiments, so that those skilled in the art can understand it.

[0038] Please see Figures 1-13 This invention proposes an integrated die-casting structure for optical module housing and heat sink. The whole structure is composed of six major components: fixed mold 1, moving mold 2, inner body 3, outer body 4, current interception component 5, and material stripping component 6. It is suitable for die-casting of optical module housing alloys such as aluminum alloy and zinc alloy.

[0039] The upper surface of the fixed mold 1 is precision machined with a sunken mold groove 11. Multiple sets of inner mold bodies 3 are fixed in a matrix at equal intervals. Each inner mold body 3 has reinforcing rib grooves 32 integrally milled on both sides to form vertical reinforcing ribs for die casting shell, thereby improving the shell's bending and torsional strength. The lower surface of the moving mold 2 is fixed with outer mold bodies 4 that correspond one-to-one with the number, position, and angle of the inner mold bodies 3. Multiple sets of fine and equidistant heat sink grooves 41 are arranged in an array on both sides of the outer mold body 4 to adapt to the integral molding of ultra-thin heat sinks of optical modules.

[0040] After the fixed mold 1 and the moving mold 2 are precisely aligned and vertically closed using guide pillars and guide sleeves, the inner body 3 and the outer body 4 fit together and lock together to form a closed die-casting cavity. This allows for one-time die-casting of a light module housing blank with reinforcing ribs and a row of integrated heat sinks on the side, eliminating the need for subsequent welding, assembly, and grinding processes.

[0041] An integrated material guiding cavity 15 is carved inside the mold groove 11. The main channel of the material guiding cavity 15 is connected to the inlet 21 of the moving mold 2. The branch channels are evenly distributed to each independent die casting cavity. An arc-shaped intercepting groove 31 is opened at the intersection of each branch channel and the cavity. A rectangular expansion groove 42 is opened at the bottom of the outer body 4 corresponding to the position of the intercepting groove 31. The expansion groove 42 is vertically divided into an inner sealing air chamber 421 and an outer limiting chamber 422. The two cavities are separated by a sealing ring to prevent air from flowing between them.

[0042] Pre-assembly process of flow blocking component 5: First, the first spring 53 and the air plug 52 are coaxially sleeved on the outside of the guide post 513 of the flow blocking block 51 from bottom to top; the internal hex bolt 522 is passed through the stepped groove 521 of the air plug 52 and locked with the bottom thread of the guide post 513 to fix and position the air plug 52; then the flow blocking block 541 is installed into the vertical mounting groove 515 of the flow blocking block 51 from top to bottom, the second spring 545 is placed in, and the cover plate 543 is fastened and fixed by fastening screws to complete the overall modular pre-assembly of the flow blocking component 5; finally, the pre-assembled flow blocking component 5 is embedded into the expansion groove 42 for limit fixation, which is convenient to assemble and can be disassembled and maintained separately in the later stage.

[0043] Assembly of the stripping assembly 6: The first ejector pin 62 and the second ejector pin 63 are vertically fastened to the upper end face of the stripping plate 61 to ensure perpendicularity and coaxiality; the inner shafts of the first ejector pin 62 and the second ejector pin 63 are precision bored to machine through-type vacuum channels, with a micro-opening at the upper end of the channel and a straight connection at the lower end to the rear side of the stripping plate 61; the stripping plate 61 is milled to collect and distribute the air channels, connecting all the ejector pin vacuum channels, and reserving an interface for an external vacuum pump; after assembly, the first ejector pin 62 is vertically inserted into the first stripping hole 33 of the inner body 3, and the second ejector pin 63 is inserted into the second stripping hole 34, with a small gap between the outer wall and the hole wall for sliding sealing, which can both smoothly eject the product and achieve a tight vacuum without leakage.

[0044] The complete die-casting process of this invention is divided into the following steps:

[0045] S1. Mold Closure and Locking: The die-casting machine drives the moving mold 2 downward, which is precisely closed and locked with the fixed mold 1 through the guide pillars and guide sleeves, forming a fully sealed multi-set die-casting cavity; at this time, the first spring 53 pushes the flow-blocking block 51 upward, and the protrusion 511 initially blocks the flow-blocking groove 31, and the flow channel is in a cut-off state; the second spring 545 pushes the flow-blocking block 541 downward to block the outlet of the air guide cavity 514 to prevent the melt from seeping in.

[0046] S2. Pre-vacuuming of the mold cavity after mold closing: Before the mold is closed and locked in place and before the molten metal is injected, the external vacuum pump is started. The vacuum is diverted through the air collection channel of the stripper plate 61 to the vacuum channels built into the first ejector pin 62 and the second ejector pin 63. The upper end of the vacuum channel is connected to the die-casting cavity, which is rapidly evacuated under negative pressure to completely remove the air, moisture, and volatile gases of the mold release agent trapped in the cavity. This creates a negative pressure environment in the cavity, eliminates the back pressure of the melt filling, and prevents the subsequent melt flow from trapping gas, thus eliminating defects such as porosity, shrinkage, and air bubbles from the source. After evacuating to the set negative pressure value, the pressure is kept stable and ready for operation.

[0047] S3. Filling the die-casting mold: Molten metal is injected into the guide chamber 15 under high pressure from the inlet 21. The pressure of the molten fluid acts on the first inclined surface 512 of the throttling block 51, forming a stable axial thrust, which overcomes the preload of the first spring 53 and pushes the throttling block 51 to move down and retract as a whole, and the throttling groove 31 is fully open. The molten material is evenly distributed into each die-casting cavity through the guide chamber 15, and smoothly fills the entire area of ​​the shell and the thin-walled heat sink in a laminar flow. During this stage, the ejector pin continuously maintains a slight negative pressure in the vacuum channel to assist in exhaust and further improve the filling quality.

[0048] S4. Automatic flow interception and pressure holding: After the cavity is fully filled, the die casting machine stops the injection, and the pressure of the molten fluid disappears instantly; the first spring 53 quickly resets due to its own elasticity, pushes the flow interception block 51 forward, and the protrusion 511 is precisely re-engaged into the flow interception groove 31, instantly cutting off the connection between the material guide cavity 15 and the die casting cavity, effectively preventing molten material backflow, cavity pressure loss and material shortage, and ensuring product size consistency and density.

[0049] S5. Air pressure cleaning of residual material in the guide cavity: During the pressure holding, cooling and shaping stage, low-pressure and high-pressure gas is introduced into the ejector air passage 43 through the second air inlet 22 of the moving mold 2. The airflow enters the air chamber 421 smoothly. The air pressure acts on the second inclined surface 542 of the flow blocking block 541, generating an upward component force to push the flow blocking block 541 to compress the second spring 545 and move upward and retract, and the guide cavity 514 is fully opened. The high-pressure airflow rushes into the guide cavity 15 at high speed through the guide cavity 514, blowing out and cleaning the residual molten material in the cavity as a whole, avoiding the residual material from cooling, solidifying and sticking to the flow channel, and ensuring continuous die casting without material blockage.

[0050] S6. Assisted venting and smooth demolding: After cooling and solidification, the vacuum pump is turned off to stop vacuuming; a small amount of residual gas inside the cavity enters the demolding air passage 12 through the gap of the mold groove 11 and is naturally discharged through the air outlet 14; low-pressure airflow can be selectively introduced through the first air inlet 13 of the fixed mold to assist mold parting and weaken the adhesion force of the product in the mold cavity; then the die casting machine drives the moving mold to open the mold, and the ejector plate 61 of the ejector assembly 6 moves upward synchronously, driving the first ejector pin 62 and the second ejector pin 63 to be ejected synchronously from multiple points from the center of the shell and the side of the heat sink, dispersing the demolding stress, avoiding deformation, cracking and chipping of the thin-walled heat sink, and achieving smooth and damage-free demolding.

[0051] S7. Reset and Standby: After demolding is completed, all springs, flow-stopping components and ejector pins automatically reset, and the mold is ready to enter the next die-casting cycle.

[0052] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of the present invention according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of the present invention. These technical solutions also fall within the scope of protection of the present invention.

Claims

1. An integrated die-cast structure of an optical module housing and a heat sink, characterized by: Includes fixed mold (1), moving mold (2), inner mold (3), outer mold (4), flow interception assembly (5), and stripping assembly (6); The fixed mold (1) has a mold groove (11) on its end face facing the moving mold (2). Several inner molds (3) are arranged in an array in the mold groove (11). The inner molds (3) have reinforcing rib grooves (32) on both sides. The moving mold (2) has outer molds (4) that correspond one-to-one with the inner molds (3) on its end face facing the fixed mold (1). The outer molds (4) have a row of heat sink grooves (41) on each side. After the fixed mold (1) and the moving mold (2) are closed, the inner molds (3) and the outer molds (4) enclose each other to form a die-casting cavity for the optical module housing with a reinforced structure and integrated heat sink. The mold groove (11) is provided with a material guiding cavity (15) that communicates with each die casting cavity. A flow intercepting groove (31) is provided at the confluence position of the material guiding cavity (15) and the die casting cavity. A telescopic groove (42) is provided at the bottom of the outer body (4). A flow intercepting component (5) adapted to the flow intercepting groove (31) is installed inside the telescopic groove (42).

2. The light module housing and heat sink integrated die casting structure according to claim 1, wherein, The telescopic groove (42) is divided into two cavities: an air chamber (421) and a limiting chamber (422). The moving mold (2) has an ejection air passage (43) connected to the air chamber (421) inside. The outer end face of the moving mold (2) has a second air inlet (22) and a feed inlet (21) respectively. The second air inlet (22) is connected to the ejection air passage (43), and the feed inlet (21) is connected to the guide cavity (15).

3. The light module housing and heat sink integrated die cast structure according to claim 2, wherein, The flow-blocking assembly (5) includes a flow-blocking block (51), an air plug (52), a first spring (53), and a flow-blocking component (54). The flow-blocking block (51) is slidably and limitedly assembled in the limiting chamber (422), and the air plug (52) is limitedly installed inside the air chamber (421). One end of the flow-blocking block (51) is provided with a protrusion (511) protruding from the limiting chamber (422), and the protrusion (511) is used to block and cut off the flow-blocking groove (31). The bottom of the protrusion (511) is provided with a first inclined surface (512). The other end of the flow-blocking block (51) is integrally formed with a guide post (513). The flow-blocking block (51) and the guide post (513) are connected to each other and a guide air chamber (514) is provided. The inlet of the guide air chamber (514) is connected to the air chamber (421), and the outlet of the guide air chamber (514) is opened on the first inclined surface (512).

4. The light module housing and heat sink integrated die cast structure according to claim 3, wherein, The air plug (52) and the first spring (53) are both fitted on the outside of the guide post (513); the air plug (52) is a conical structure, and a stepped groove (521) is opened on the end face of the air plug (52). An internal hexagon bolt (522) is inserted in the stepped groove (521). The internal hexagon bolt (522) is threaded to the end of the guide post (513) to realize the fixed assembly of the air plug (52); the two ends of the first spring (53) respectively abut against the opposite end faces of the intercepting block (51) and the air plug (52), providing elastic preload for the intercepting block (51) and the air plug (52); during injection, the first inclined surface (512) is squeezed by the melt pressure, driving the intercepting block (51) to compress the first spring (53) and retract, opening the intercepting groove (31) so that the melt flows into the die casting cavity.

5. The integrated die-cast structure of optical module housing and heat sink according to claim 3, characterized in that, The flow-blocking component (54) includes a flow-blocking block (541), a cover plate (543), and a second spring (545); the flow-blocking block (51) has a vertically arranged mounting groove (515), and the flow-blocking block (541) is vertically slidably assembled in the mounting groove (515), and the bottom of the flow-blocking block (541) has a second inclined surface (542); the cover plate (543) is fixedly installed on the top of the flow-blocking block (51) by screws, and the bottom of the cover plate (543) has a positioning groove. (544), the second spring (545) is placed in the positioning groove (544), and the two ends of the second spring (545) abut against the flow blocking block (541) and the cover plate (543) respectively; under normal conditions, the second spring (545) pushes the flow blocking block (541) to block the air guide cavity (514). After the material discharge air passage (43) is filled with air, the airflow acts on the second inclined surface (542) to drive the flow blocking block (541) to compress the second spring (545) to retract and open the air guide cavity (514).

6. The integrated die-cast structure of optical module housing and heat sink according to claim 1, characterized in that, The inner body (3) has a first unloading hole (33) at its center and a second unloading hole (34) at its side near the cavity of the reinforcing rib groove (32).

7. The integrated die-cast structure of optical module housing and heat sink according to claim 6, characterized in that, The stripping assembly (6) includes a stripping plate (61), a first ejector pin (62), and a second ejector pin (63). The first ejector pin (62) and the second ejector pin (63) are both vertically fixed to the end face of the stripping plate (61). The first ejector pin (62) is axially coaxially matched with the first stripping hole (33), and the second ejector pin (63) is axially coaxially matched with the second stripping hole (34). The first ejector pin (62) and the second ejector pin (63) are both provided with vacuum channels. One end of the vacuum channel is connected to the inside of the die-casting cavity, and the other end is connected to a vacuum pumping device. After the mold is closed and before the molten metal is filled, the die-casting cavity is evacuated under negative pressure through the vacuum channel to remove the air in the cavity, eliminate the back pressure of filling, and avoid the gas from being trapped in the molten metal, thus preventing the formation of porosity defects.

8. The integrated die-cast structure of optical module housing and heat sink according to claim 1, characterized in that, The mold groove (11) has a venting channel (12) near the edge corner, and the venting channel (12) has an air outlet (14) at its end; the bottom of the fixed mold (1) has a first air inlet (13), which is connected to the mold groove (11) and the venting channel (12).

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