Projector shell injection mold

Abstract

The utility model discloses an injection mold for a projector shell. The lower mold and the upper mold are assembled to form a cavity for injection molding; the first jacking structure and the second jacking structure are vertically stacked in the lower mold, and the push-out end of the first jacking structure and the push-out end of the second jacking structure both communicate with the cavity; the second jacking structure is used for pushing the first jacking structure to move towards the cavity together, and the first jacking structure can independently move towards the cavity; the push-out angles of the first jacking structure and the second jacking structure are different. Through the unique up-and-down stacking design of the first jacking structure and the second jacking structure, the segmented demolding function is achieved. According to the design, when the mold treats a projector shell with a complex geometrical shape or an internal inverted buckle, damage to a product can be reduced, and the demolding efficiency and the yield of the product are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of film and television equipment manufacturing and relates to an injection mold for a projector shell. Background Art

[0002] In the field of injection molding, especially for the manufacture of complex structures such as projector housings, accurate and efficient demoulding mechanisms are crucial. Traditional injection molds usually use a single lifting structure for demoulding, which has many shortcomings when facing injection molded parts with complex geometric shapes and long undercut features. Traditional molds often use a single lifting structure with a fixed lifting angle, which is difficult to adapt to the demoulding requirements of different parts. Especially for injection molded parts such as projector housings with inner and outer walls and complex undercut structures, the single-angle lifting structure is difficult to provide sufficient ejection force and flexibility, resulting in demoulding difficulties or product damage. Due to the lack of a flexible lifting mechanism, traditional molds require greater force and more time during the demoulding process, which not only reduces production efficiency, but also increases production costs. The defect of the existing technology is the lack of a flexible, efficient and safe mold design that can adapt to the demoulding requirements of complex injection molded parts.

[0003] Inventive content

[0004] The utility model provides an injection mold for a projector housing. By stacking a first lifting structure and a second lifting structure up and down to arrange segmented demoulding, the purpose of reducing damage to the product when processing a projector housing with a complex geometric shape or an internal undercut is achieved.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A projector housing injection mold, comprising:

[0007] A lower mold and an upper mold, wherein the lower mold and the upper mold are combined to form a cavity for injection molding;

[0008] a first jacking structure and a second jacking structure, wherein the first jacking structure and the second jacking structure are stacked up and down and arranged in the lower mold, and the ejection ends of the first jacking structure and the second jacking structure are both connected to the mold cavity;

[0009] The second lifting structure is used to push the first lifting structure to move together toward the mold cavity, and the first lifting structure can move toward the mold cavity alone;

[0010] The first lifting structure and the second lifting structure have different pushing-out angles.

[0011] Furthermore, the first lifting structure includes a first top plate, a first top rod and a first driving member;

[0012] The first ejector rod is mounted on a side of the first ejector plate facing the mold cavity, the first driving member is mounted on the other side of the first ejector plate, and the ejection end of the first ejector rod is in communication with the mold cavity;

[0013] The second jacking structure includes a second top plate, a second jack rod and a second driving member;

[0014] The second ejector rod is mounted on a side of the second ejector plate facing the mold cavity, the second driving member is mounted on the other side of the second ejector plate, and the ejection end of the second ejector rod passes through the first ejector plate and communicates with the mold cavity;

[0015] The first top plate is arranged on a side of the second top plate facing the cavity.

[0016] Furthermore, the second push rod is arranged around the outer circumference of the first push rod.

[0017] Furthermore, the extension direction of the first ejector pin is perpendicular to the mold surface between the upper mold and the lower mold;

[0018] An extending direction of the second ejector pin forms an angle with a mating surface between the upper die and the lower die.

[0019] Furthermore, the second top rod includes a push rod and a bearing seat installed in the second top plate;

[0020] The bottom of the bearing seat is in transmission connection with the second driving member, and the bearing seat passes through the first top plate and is in sliding connection with the first top plate;

[0021] One end of the push rod is embedded in the top of the bearing seat, and the other end of the push rod is communicated with the cavity.

[0022] Furthermore, the first top plate and the second top plate are stacked and arranged in parallel.

[0023] Furthermore, a limiting block is provided on the top of the first driving member, and a limiting groove is provided on the end surface of the second top plate facing the cavity. The first driving member passes through the second top plate, and the limiting block and the limiting groove are engaged.

[0024] Furthermore, cooling pipes are provided in both the lower mold and the upper mold. The cooling pipes are arranged around the mold cavity and are used to cool the injection-molded part after injection molding is completed.

[0025] Furthermore, the mating surface of the upper mold is provided with a guide sleeve, and the mating surface of the lower mold is provided with a guide post matching the guide sleeve, and the guide post and the guide sleeve are slidably connected.

[0026] Furthermore, the sides of the first lifting structure and the second lifting structure are respectively provided with mutually matching clamping blocks and clamping grooves;

[0027] The clamping block and the clamping slot are movably connected.

[0028] The present invention provides a projector housing injection mold that can accommodate complex geometries and internal undercuts. Through its unique stacked design of a first and second lifting structure, the mold achieves staged demolding. This design reduces damage to the product when handling projector housings with complex geometries or internal undercuts, improving demolding efficiency and yield. Specifically, the different ejection angles of the first and second lifting structures allow the mold to adapt to the demolding requirements of different parts of the product. In particular, for products with long undercuts, demolding can be performed in stages to accommodate the unique shape and structure of the product. During the first ejection, the second lifting structure pushes against the first lifting structure, providing sufficient ejection force to overcome the adhesion between the product and the mold and initiate the demolding process. Subsequently, during the second ejection, the first lifting structure acts alone, continuing to push the product out of the mold, while the second lifting structure remains stationary. This staged ejection method allows for more precise control of the demolding process and reduces damage to the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic structural diagram of the utility model.

[0030] Figure 2 It is a cross-sectional view of the jacking structure of the utility model.

[0031] Figure 3 It is a sectional stereoscopic view of the jacking structure of the utility model.

[0032] Figure 4 It is a schematic diagram of the structure of the jacking structure and the jacking injection molding of the utility model.

[0033] Figure 5 This is a schematic diagram of the first top plate structure of the utility model.

[0034] Figure 6 It is a structural schematic diagram of the guide post and guide sleeve of the utility model.

[0035] Figure 7 It is a structural diagram of the injection molded part of the utility model.

[0036] The accompanying drawings are marked as follows: 1-lower mold; 2-upper mold; 3-first jacking structure; 4-second jacking structure; 5-cavity; 6-limiting block; 7-limiting groove; 8-cooling pipe; 11-guide column; 12-guide sleeve; 31-first top plate; 32-first push rod; 33-first driving member; 34-clamping block; 41-second top plate; 42-second push rod; 43-second driving member; 44-clamping groove; 421-bearing seat; 422-push rod. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. It should be understood that this application is not limited to the example embodiments disclosed herein. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0038] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0040] In the embodiments of the present invention, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium; internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0041] The utility model provides an attached Figures 1 to 7In an embodiment of the present invention, a projector housing injection mold includes:

[0042] A lower mold 1 and an upper mold 2, wherein the lower mold 1 and the upper mold 2 are combined to form a cavity 5 for injection molding;

[0043] A first jacking structure 3 and a second jacking structure 4, wherein the first jacking structure 3 and the second jacking structure 4 are stacked up and down and arranged in the lower mold 1, and the ejection ends of the first jacking structure 3 and the second jacking structure 4 are both connected to the mold cavity 5;

[0044] The second lifting structure 4 is used to push the first lifting structure 3 to move together toward the mold cavity 5. The first lifting structure 3 can move toward the mold cavity 5 alone.

[0045] The first lifting structure 3 and the second lifting structure 4 have different pushing-out angles.

[0046] Specifically, the mold consists of a lower mold 1 and an upper mold 2. When these two parts are combined, a cavity 5 for injection molding is formed. The cavity 5 is designed according to the shape and size of the projector housing to ensure that the housing after injection molding matches the design requirements. The housing of this application has a long undercut, and the shape of the cavity 5 also corresponds. Inside the lower mold 1, two sets of lifting structures are designed, namely the first lifting structure 3 and the second lifting structure 4. The two lifting structures are stacked up and down, and the ejection ends of the two lifting structures are connected to the cavity 5, which means that after injection molding, they can directly contact the molded projector housing to facilitate demolding. Furthermore, the function of the second lifting structure 4 is to push the first lifting structure 3 during the first ejection, so that the two move together toward the cavity 5. In the early stage of demolding, the adhesion between the injection molded part and the mold can be overcome by a larger lifting force, thereby starting the demolding process. Subsequently, during the second ejection, the second lifting structure 4 remains stationary, while the first lifting structure 3 continues to move alone toward the cavity 5. This staged ejection method can more finely control the demolding process, especially when processing projector housings with complex geometries or internal undercuts, which can reduce damage to the product.

[0047] More specifically, in the design of the injection mold for the projector housing, the different ejection angles of the first lifting structure 3 and the second lifting structure 4 are intended to meet complex demolding requirements, especially when dealing with products with longer undercut features. This design allows the mold to be carried out in stages during the demolding process to adapt to the special shape and structure of the product, ensuring that the product can be safely and efficiently removed from the mold. The second lifting structure 4 can be tilted to make it easier to contact the inner wall of the product. This is because the inner wall parts are often more difficult to demold because they have a larger contact area with the mold and stronger adhesion. During the first ejection, the first lifting structure 3 and the second lifting structure 4 can provide sufficient ejection force to overcome the adhesion between the product and the mold, especially for those products with longer undercuts and inner wall parts that are difficult to demold. The tilt angle of the second lifting structure 4 allows it to fit closely with the inner wall of the product during the first ejection, thereby effectively starting the demolding process. Subsequently, during the second ejection, the second lifting structure 4 remains stationary while the first lifting structure 3 continues to eject. This design allows the first lifting structure 3 to continue to act on the center of the product, which is generally easier to remove the product because the undercut feature in the center area is shorter, making demolding relatively easy. The first lifting structure 3 is pushed out at a different angle than the second lifting structure 4, allowing it to act more directly on the center of the product, providing the necessary ejection force while avoiding excessive action on the inner wall of the product, which may cause damage.

[0048] The first lifting structure 3 includes a first top plate 31, a first top rod 32 and a first driving member 33;

[0049] The first ejector rod 32 is mounted on a side of the first top plate 31 facing the mold cavity 5 , and the first driving member 33 is mounted on the other side of the first top plate 31 . The ejection end of the first ejector rod 32 is in communication with the mold cavity 5 .

[0050] The second lifting structure 4 includes a second top plate 41, a second top rod 42 and a second driving member 43;

[0051] The second ejector rod 42 is mounted on the side of the second top plate 41 facing the cavity 5, and the second driving member 43 is mounted on the other side of the second top plate 41. The ejection end of the second ejector rod 42 passes through the first top plate 31 and communicates with the cavity 5.

[0052] The first top plate 31 is disposed on a side of the second top plate 41 facing the cavity 5 .

[0053] Specifically, one side of the first top plate 31 is connected to a first driving member 33, and the other side is connected to a first ejector pin 32. During the demolding process, the first driving member 33 activates and pushes the first top plate 31. This action is transmitted to the first ejector pin 32, causing its ejection end connected to the mold cavity 5 to begin to move, thereby pushing the molded part outward. Similarly, one side of the second top plate 41 is connected to a second driving member 43, and the other side is connected to a second ejector pin 42. When the second driving member 43 is activated, it pushes the second top plate 41. This action is transmitted to the second ejector pin 42, causing its ejection end to pass through the portion of the first top plate 31 connected to the mold cavity 5 and begin to move, thereby pushing the molded part outward.

[0054] During the first ejection stage of demolding, the second ejector plate 41 is pushed by the second driving member 43. Because the second ejector plate 41 and the first ejector plate 31 are in contact with each other, this push causes the first ejector plate 31 to move with it. The two ejector structures work together to push the molded part out of the mold. This synergistic effect is particularly suitable for projector housings with complex geometries and long undercuts, as it provides a uniform and balanced force to overcome adhesion between the molded part and the mold. During the second ejection stage of demolding, the second ejector plate 41 remains stationary while the first ejector plate 31 continues to be pushed by the first driving member 33. At this time, the first ejector pin 32 continues to push the molded part outward, while the second ejector pin 42 stops. This staged ejection mechanism allows different forces to be applied to the molded part at different stages of demolding to accommodate complex shapes and undercuts. The tilted position of the second ejector pin 42 allows it to fit tightly against the inner wall of the part during the first ejection, while the first ejector plate 31 continues to act on the center of the part during the second ejection, facilitating easy removal of the part.

[0055] Furthermore, the first driving member 33 and the second driving member 43 include but are not limited to a hydraulic cylinder that uses the pressure of hydraulic oil to push the piston to achieve the movement of the top plate, or a cylinder that uses compressed air as a power source to push the piston through changes in air pressure to achieve the movement of the top plate, or an electric push rod 422 that drives a screw or gear through an electric motor to push the top plate directly or through a connecting rod.

[0056] The second push rod 42 is disposed around the outer circumference of the first push rod 32 .

[0057] Specifically, the first ejector pin 32 is directly connected to the first ejector plate 31 and extends to the cavity 5 for directly pushing the injection molded part, while the second ejector pin 42 is designed to surround the outer circumference of the first ejector pin 32 and is connected to the cavity 5 through the second ejector plate 41. This layout means that the second ejector pin 42 can move around the first ejector pin 32 without interfering with the movement of the first ejector pin 32. The key advantage of this design is that it allows the two ejector structures to play different roles in different demoulding stages while maintaining the compactness and efficiency of the mechanical structure.

[0058] Furthermore, in this embodiment, a plurality of first push rods 32 are arranged around an inner circle, and a plurality of second push rods 42 are arranged on the outer circumference of the first push rods 32 to form an outer circle. The displacement directions of the first push rods 32 and the second push rods 42 are independent of each other and do not interfere with each other.

[0059] The extending direction of the first ejector rod 32 is perpendicular to the mold surface between the upper mold 2 and the lower mold 1;

[0060] An extending direction of the second ejector pin 42 forms an angle with a mating surface between the upper mold 2 and the lower mold 1 .

[0061] Specifically, the first ejector pin 32 is designed to extend perpendicular to the mold surface between the upper mold 2 and lower mold 1. This perpendicular design allows the first ejector pin 32 to align directly with the central area of ​​the molded part, which is typically flat and has a short undercut, making it suitable for direct upward ejection. This arrangement allows the first ejector pin 32 to continue pushing the molded part during the second demolding phase, as it can directly act on the center of the part, providing the required ejection force while minimizing interference with the edges or details of the part. The second ejector pin 42 is designed to extend at an angle to the mold surface. This tilted design allows the second ejector pin 42 to better conform to the inner wall of the molded part. Especially for molded parts with long undercuts, the tilted arrangement of the second ejector pin 42 allows it to closely mate with the inner wall of the molded part during the first ejection, effectively initiating the demolding process. Furthermore, since the second ejector pin 42 surrounds the periphery of the first ejector pin 32, its tilted extension allows it to independently contact and act on the inner wall of the molded part without interfering with the first ejector pin 32.

[0062] The second top rod 42 includes a push rod 422 and a bearing seat 421 installed in the second top plate 41;

[0063] The bottom of the bearing seat 421 is in transmission connection with the second driving member 43 , and the bearing seat 421 passes through the first top plate 31 and is in sliding connection with the first top plate 31 ;

[0064] One end of the push rod 422 is embedded in the top of the bearing seat 421 , and the other end of the push rod 422 is connected to the mold cavity 5 .

[0065] The bearing seat 421 of the second push rod 42 is fixedly installed in the second top plate 41, and its bottom is directly connected to the second driving member 43. The driving member is responsible for providing power to push the bearing seat 421 to move up and down. The top of the bearing seat 421 is designed with a groove or hole, and one end of the push rod 422 is embedded therein, allowing the push rod 422 to move with the up and down movement of the bearing seat 421. The other end of the push rod 422 is connected to the cavity 5 and directly acts on the injection molded part to push it out of the mold. Furthermore, during the demolding process, when the first top plate 31 needs to move upward to push the injection molded part out of the mold, the design of the bearing seat 421 and the second push rod 42 ensures that the second push rod 42 can move downward or remain stationary, thereby providing sufficient space for the movement of the first top plate 31. This layout allows the first top plate 31 to push the injection molded part without being hindered by the presence of the second top rod 42, avoiding direct contact or collision between the top plate and the top rod, reducing mechanical interference, and ensuring a smooth demolding process. Furthermore, the shape of the support seat 421 includes but is not limited to cylindrical and rectangular shapes.

[0066] The first top plate 31 and the second top plate 41 are stacked and arranged in parallel.

[0067] In the design of the injection mold for the projector housing, the stacked parallel arrangement of the first top plate 31 and the second top plate 41 allows the two lifting structures to work together in the vertical direction while maintaining their respective independence. Specifically, the design of the first top plate 31 and the second top plate 41 allows them to be stacked in the vertical direction and parallel to each other. This arrangement means that the two top plates share the same vertical axis, thereby ensuring that during the demolding process, the movement of the top plates can be precisely controlled and will not interfere with each other. This parallel arrangement design allows the mold to achieve efficient lifting action within a limited space, especially when the vertical space of the injection mold is limited.

[0068] More specifically, during the demolding process, the second top plate 41 is first pushed by the driving member. Since the second top plate 41 is arranged parallel to the first top plate 31, this push can be directly transmitted to the first top plate 31 along the vertical axis. This transmission can be achieved through a mechanical connection. For example, the driving member of the second top plate 41 can directly or indirectly push the first top plate 31 through a connecting rod or other mechanical structure, or the movement of the second top plate 41 can guide the movement of the first top plate 31 through the structural design of the mold frame.

[0069] A limit block 6 is provided on the top of the first driving member 33 , and a limit groove 7 is provided on the end surface of the second top plate 41 facing the cavity 5 . The first driving member 33 passes through the second top plate 41 , and the limit block 6 is engaged with the limit groove 7 .

[0070] Specifically, a limit block 6 is designed on the top of the first driving member 33. This limit block 6 is a simple and effective mechanical component, and its shape includes but is not limited to a ring, block, triangle or other irregular shapes. Its main function is to provide a stopping point when the first driving member 33 moves downward to prevent the driving member from dropping excessively. The shape and size of the limit block 6 are designed to perfectly match the limit groove 7 on the end face of the second top plate 41. The end face of the second top plate 41 facing the cavity 5 is provided with a limit groove 7 that matches the limit block 6. This limit groove 7 is a groove on the second top plate 41, and its size and shape are precisely designed to ensure that the limit block 6 can fully fit and snap into it. When the first driving member 33 moves downward, the limit block 6 will eventually meet the limit groove 7. At this time, the edge of the limit block 6 will snap into the limit groove 7, thereby preventing the first driving member 33 from sliding further down.

[0071] Cooling pipes 8 are provided in both the lower mold 1 and the upper mold 2 . The cooling pipes 8 are arranged around the mold cavity 5 . The cooling pipes 8 are used to cool the molded part after injection molding is completed.

[0072] In this embodiment, a plurality of cooling pipes 8 are provided in both the lower mold 1 and the upper mold 2, and the cooling pipes 8 are arranged around the mold cavity 5, with the purpose of effectively cooling the injection molded part after the injection molding is completed. During the injection molding process, after the molten plastic is injected into the mold cavity 5, it will undergo a cooling and solidification process for a certain period of time. The speed and uniformity of the cooling directly affect the final quality of the injection molded part. Generally, the main purpose of cooling is to solidify the molten plastic as quickly as possible and reduce the temperature non-uniformity during the cooling process, thereby avoiding deformation, warping or internal stress problems caused by uneven cooling. In order to ensure the uniformity of the cooling effect, the cooling pipes 8 are arranged around the mold cavity 5 to ensure that each area of ​​the mold cavity 5 can be sufficiently cooled.

[0073] The mating surface of the upper mold 2 is provided with a guide sleeve 12 , and the mating surface of the lower mold 1 is provided with a guide post 11 matching the guide sleeve 12 , and the guide post 11 and the guide sleeve 12 are slidably connected.

[0074] Specifically, the closing surface of the upper mold 2 is designed with one or more guide sleeves 12, which are precisely manufactured cylindrical parts fixed on the upper mold 2. The main function of the guide sleeve 12 is to serve as a guiding device to ensure that the upper mold 2 and the lower mold 1 can be accurately docked along a predetermined path when closing the mold. The design of the guide sleeve 12 takes into account the size, shape and precision required for closing the mold to ensure that the mold can maintain correct alignment even under high pressure. Correspondingly, the closing surface of the lower mold 1 is provided with guide posts 11 that match the guide sleeves 12 of the upper mold 2. These guide posts 11 are precisely manufactured cylindrical parts. They are completely matched with the size of the guide sleeves 12 of the upper mold 2 and can slide freely inside the guide sleeves 12. The design of the guide posts 11 also takes into account the operating requirements of the mold to ensure stable sliding performance throughout the life cycle of the mold. During the mold closing process, the guide pin 11 slides along the guide sleeve 12 to ensure that the closing surfaces of the upper mold 2 and the lower mold 1 can be accurately docked. This sliding connection allows the mold to absorb minor errors and deviations during mold closing, reducing the impact force during mold closing, thereby extending the service life of the mold. At the same time, the cooperation of the guide pin 11 and the guide sleeve 12 also helps to smoothly separate the upper mold 2 and the lower mold 1 when opening the mold, reducing damage caused by misalignment or excessive friction.

[0075] The sides of the first lifting structure 3 and the second lifting structure 4 are respectively provided with a clamping block 34 and a clamping groove 44 that match each other;

[0076] The clamping block 34 and the clamping slot 44 are movably connected.

[0077] Specifically, the snap-in block 34 and the snap-in groove 44 are respectively arranged on the sides of the first jacking structure 3 and the second jacking structure 4. The matching design between them allows the two structures to be fixed and positioned in a direction perpendicular to the mold surface. The snap-in block 34 is a raised portion on the side of the first jacking structure 3, and the snap-in groove 44 is a groove protruding from the side of the second jacking structure 4. Their shapes and sizes are precisely designed to ensure that they can match each other. During the assembly process of the mold, the snap-in block 34 is precisely aligned and inserted into the snap-in groove 44. This insertion operation can be sliding or rotating, depending on the specific usage scenario of the snap-in block 34 and the snap-in groove 44. Once the snap-in block 34 is fully inserted into the snap-in groove 44, they will lock the relative positions of the two jacking structures to prevent position displacement due to pressure or other external forces during the injection molding process.

[0078] It should also be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0079] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present application. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A projector housing injection mold, characterized in that: include; A lower mold and an upper mold, wherein the lower mold and the upper mold are combined to form a cavity for injection molding; a first jacking structure and a second jacking structure, wherein the first jacking structure and the second jacking structure are stacked up and down and arranged in the lower mold, and the ejection ends of the first jacking structure and the second jacking structure are both connected to the mold cavity; The second lifting structure is used to push the first lifting structure to move together toward the mold cavity, and the first lifting structure can move toward the mold cavity alone; The first lifting structure and the second lifting structure have different pushing-out angles.

2. The projector housing injection mold according to claim 1, characterized in that: The first jacking structure includes a first top plate, a first jack rod and a first driving member; The first ejector rod is mounted on a side of the first ejector plate facing the mold cavity, the first driving member is mounted on the other side of the first ejector plate, and the ejection end of the first ejector rod is in communication with the mold cavity; The second jacking structure includes a second top plate, a second jack rod and a second driving member; The second ejector rod is mounted on a side of the second ejector plate facing the mold cavity, the second driving member is mounted on the other side of the second ejector plate, and the ejection end of the second ejector rod passes through the first ejector plate and communicates with the mold cavity; The first top plate is arranged on a side of the second top plate facing the cavity.

3. The projector housing injection mold according to claim 2, characterized in that: The second push rod is arranged around the outer circumference of the first push rod.

4. The projector housing injection mold according to claim 2, characterized in that: The extending direction of the first ejector pin is perpendicular to the mold surface between the upper mold and the lower mold; An extending direction of the second ejector pin forms an angle with a mating surface between the upper die and the lower die.

5. The projector housing injection mold according to claim 2, characterized in that: The second top rod includes a push rod and a bearing seat installed in the second top plate; The bottom of the bearing seat is in transmission connection with the second driving member, and the bearing seat passes through the first top plate and is in sliding connection with the first top plate; One end of the push rod is embedded in the top of the bearing seat, and the other end of the push rod is communicated with the cavity.

6. The projector housing injection mold according to claim 2, characterized in that: The first top plate and the second top plate are stacked and arranged in parallel.

7. The projector housing injection mold according to claim 2, characterized in that: A limiting block is provided on the top of the first driving member, a limiting groove is provided on the end surface of the second top plate facing the cavity, the first driving member passes through the second top plate, and the limiting block is engaged with the limiting groove.

8. The projector housing injection mold according to claim 1, characterized in that: Cooling pipes are provided in both the lower mold and the upper mold. The cooling pipes are arranged around the mold cavity and are used to cool the injection-molded part after injection molding is completed.

9. The projector housing injection mold according to claim 1, characterized in that: The mating surface of the upper mold is provided with a guide sleeve, and the mating surface of the lower mold is provided with a guide column matching the guide sleeve, and the guide column and the guide sleeve are slidably connected.

10. The projector housing injection mold according to claim 1, characterized in that: The sides of the first lifting structure and the second lifting structure are respectively provided with mutually matching clamping blocks and clamping grooves; The clamping block and the clamping slot are movably connected.

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