Injection mold and powder suction nozzle core

Abstract

The utility model discloses a kind of injection mould and powder suction nozzle core, injection mould includes fixed mould assembly, movable mould assembly, slider assembly and ejection assembly, fixed mould assembly and movable mould assembly cooperation form product cavity, slider assembly is slidably set on movable mould assembly, for the internal structure of shaped product and realizes internal structure demolding when opening mould, ejection assembly is used to eject product from movable mould assembly. Traditional powder suction nozzle core production relies on external procurement and numerical control lathe processing, leading to long procurement cycle, high cost, and the mould of the utility model realizes internal batch production, fixed mould assembly and movable mould assembly ensure product external shaping, slider assembly handles internal complex structure, ejection assembly realizes automatic demolding, to significantly shorten production time, reduce dependence on suppliers;While injection molding process allows using low-cost materials, reduces raw material cost;And, automated process improves production efficiency and product precision, avoids clamping error and deformation problem.

Description

Technical Field

[0001] This utility model relates to the field of mold manufacturing technology, and in particular to an injection mold and a powder suction nozzle core. Background Technology

[0002] The powder suction nozzle core is a key component in powder coating equipment, used to transport powder coating. During daily spraying, the powder coating, driven by compressed air, continuously erodes the inner wall of the nozzle core. Due to factors such as the hardness and shape of the powder, as well as the airflow speed, continuous friction occurs on the surface of the nozzle core. This results in damage such as grooves and pits on the nozzle core surface. Simultaneously, the inner diameter of the nozzle core may increase due to wear, making it difficult to control the powder-air mixture ratio, leading to poorer spraying results and a sharp decline in the performance of the nozzle core until it ceases to function properly. Therefore, frequent replacement is necessary. Currently, powder suction nozzle cores are mainly produced using polytetrafluoroethylene (PTFE) material through CNC lathe machining. This traditional production method suffers from low efficiency and difficulty in guaranteeing product precision, and it is also difficult to mold complex internal structures, limiting the improvement of production efficiency and product quality. Utility Model Content

[0003] The present invention provides an injection mold and a powder suction nozzle core, which can efficiently produce the injection mold for the powder suction nozzle core, thereby solving the technical problem of low production efficiency in the prior art.

[0004] To address the aforementioned problems, according to one aspect of this application, an embodiment of the present invention provides an injection mold comprising a fixed mold assembly, a moving mold assembly, a slider assembly, and an ejector assembly. The fixed mold assembly and the moving mold assembly cooperate to form a product cavity. The slider assembly is slidably disposed on the moving mold assembly for molding the internal structure of the product and for demolding the internal structure during mold opening. The ejector assembly is used to eject the product from the moving mold assembly.

[0005] In some embodiments, the slider assembly includes a slider body, an insert, and a pin, wherein the insert is fixed to the slider body and the pin is mounted on the insert.

[0006] In some embodiments, the slider assembly further includes an inclined guide post and a spring, the inclined guide post being disposed on the fixed mold assembly and the spring being disposed on the slider body; the inclined guide post is used to drive the slider body to retract during mold opening, and the spring is used to assist the slider body in retraction and resetting.

[0007] In some embodiments, the slider assembly further includes a positioning pin disposed on the slider body for guiding the linear motion of the spring.

[0008] In some embodiments, the slider assembly further includes a positioning block disposed on the moving mold assembly for positioning the slider body after mold opening.

[0009] In some embodiments, the ejection assembly includes an ejector pin, an ejector plate, and an ejector roller, wherein the ejector pin is mounted on the ejector plate and the ejector roller is used to push the ejector plate, thereby driving the ejector pin to eject the product.

[0010] In some embodiments, the ejector plate includes a top plate and a bottom plate, the top plate and the bottom plate are fixedly connected, and the ejector pin is mounted on the top plate.

[0011] In some embodiments, the ejection assembly further includes a return pin and a return pin spring. The return pin is mounted on the ejector plate, and the return pin spring is sleeved on the return pin to automatically reset the ejector plate during mold closing.

[0012] In some embodiments, the ejection assembly further includes a limiting post mounted on the ejector plate to limit the ejection stroke of the ejector plate.

[0013] In some embodiments, the fixed mold assembly includes a fixed template and a fixed mold insert, and the moving mold assembly includes a moving template and a moving mold insert. The fixed mold insert is fixed to the fixed template, and the moving mold insert is fixed to the moving template. The fixed mold insert and the moving mold insert cooperate to form a product cavity.

[0014] In some embodiments, the injection mold further includes a robotic arm for automatically removing the product and sprue, the robotic arm being disposed between the stationary mold assembly and the moving mold assembly.

[0015] According to another aspect of this application, an embodiment of the present invention provides a powder suction nozzle core, which is made by the above-mentioned injection mold, and the powder suction nozzle core includes an internal hole that is injection molded in one step by the insert pin of the slider assembly.

[0016] In some embodiments, the powder suction nozzle core is made of polyamide 66 or nylon 66.

[0017] Compared with the prior art, the injection mold of this utility model has at least the following beneficial effects: The injection mold provided by this utility model includes a fixed mold assembly, a moving mold assembly, a slider assembly, and an ejection assembly. The fixed mold assembly and the moving mold assembly cooperate to form a product cavity. The slider assembly is slidably disposed on the moving mold assembly and is used to form the internal structure of the product and to demold the internal structure when the mold is opened. The ejection assembly is used to eject the product from the moving mold assembly.

[0018] Traditional powder suction nozzle core production relies on external procurement and CNC lathe machining, resulting in long procurement cycles and high costs. However, the mold of this utility model enables internal mass production. The fixed mold component and moving mold component ensure the external molding of the product, the slider component handles the complex internal structure, and the ejection component enables automatic demolding, thereby significantly shortening the production time and reducing dependence on suppliers. At the same time, the injection molding process allows the use of low-cost materials, reducing raw material costs. Furthermore, the automated process improves production efficiency and product precision, avoiding clamping errors and deformation problems in traditional machining.

[0019] The powder suction nozzle core provided by this utility model is designed based on the above-mentioned injection mold, and its beneficial effects are the same as those of the above-mentioned injection mold, which will not be repeated here.

[0020] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0022] Figure 1 This is a cross-sectional view of an injection mold provided in an embodiment of this utility model; Figure 2 yes Figure 1 A magnified view of a section at point A in the middle; Figure 3 This is a schematic diagram of the structure of an injection mold provided in an embodiment of this utility model; Figure 4 This is a schematic diagram of the structure of a product and a sprue in an injection mold according to an embodiment of the present invention; Figure 5 This is a schematic diagram of an injection mold after mold closing, provided by an embodiment of this utility model; Figure 6 This is a schematic diagram of an injection mold with an opening diameter of 99mm-101mm provided in an embodiment of this utility model; Figure 7 This is a schematic diagram of another angle when the injection mold is opened to 99mm-101mm, according to an embodiment of this utility model. Figure 8This is a schematic diagram of an injection mold with an opening diameter of 149mm-151mm provided in an embodiment of this utility model; Figure 9 This is a schematic diagram of another angle when the injection mold is opened to 149mm-151mm, according to an embodiment of this utility model. Figure 10 This is a schematic diagram of a product ejected from an injection mold according to an embodiment of the present invention; Figure 11 This is a schematic diagram of an injection mold after the product and sprue have been ejected, according to an embodiment of this utility model. Figure 12 This is a schematic diagram of the structure of a powder suction nozzle core provided in an embodiment of this utility model; Figure 13 This is a cross-sectional view of a powder suction nozzle core provided in an embodiment of this utility model; Figure label explanation: 10. Fixed mold assembly; 11. Fixed mold insert; 12. Fixed mold plate; 13. Locating ring; 14. Sprue; 20. Moving mold assembly; 21. Moving mold insert; 22. Moving mold plate; 23. Pressure bar; 24. Socket head screw; 30. Slider assembly; 31. Slider body; 32. Insert; 33. Insert pin; 34. Angled guide post; 35. Spring; 36. Locating pin; 37. Locating block; 40. Ejector assembly; 41. Ejector pin; 42. Ejector plate; 43. Ejector roller; 44. Return pin; 45. Return pin spring; 46. Limiting post; 47. Debris pin; 421. Top plate; 422. Bottom plate; 50. Robot arm; 60. Product; 70. Sprue. Detailed Implementation

[0023] To further illustrate the technical means and effects adopted by this utility model to achieve its intended purpose, the specific implementation methods, structures, features, and effects according to this utility model application are described in detail below with reference to the accompanying drawings and preferred embodiments. In the following description, different "an embodiment" or "an embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0024] In the description of this utility model, it should be clarified that the terms "first," "second," etc., in the specification, claims, and drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence; the terms "vertical," "lateral," "longitudinal," "front," "back," "left," "right," "up," "down," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this utility model, and do not mean that the device or element referred to must have a specific orientation or position, and therefore should not be construed as a limitation of this utility model.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0027] Example 1 This embodiment provides an injection mold, such as Figure 1-11 As shown, the injection mold includes a fixed mold assembly 10, a moving mold assembly 20, a slider assembly 30, and an ejection assembly 40. The fixed mold assembly 10 and the moving mold assembly 20 cooperate to form a product cavity. The slider assembly 30 is slidably disposed on the moving mold assembly 20 and is used to form the internal structure of the product and to demold the internal structure when the mold is opened. The ejection assembly 40 is used to eject the product from the moving mold assembly 20.

[0028] The fixed mold assembly 10 is fixedly mounted on the fixed worktable of the injection molding machine, while the moving mold assembly 20 is mounted on the moving worktable of the injection molding machine. The two fit tightly together during mold closing to form the product cavity, ensuring accurate shaping of the product's external form. The slider assembly 30 is slidably mounted on the moving mold assembly 20 and is typically limited and guided by a guiding mechanism such as pressure bars or guide rails, allowing it to move laterally on the moving mold assembly 20. The ejector assembly 40 is integrated inside the moving mold assembly 20 and mechanically connected to it, and can be activated and move forward during mold opening. More specifically, after mold assembly is complete, the alignment of the fixed mold assembly 10 and the moving mold assembly 20 ensures the accuracy of the cavity. The slider assembly 30 is embedded in the moving mold assembly 20 and remains in a fixed position during mold closing, while the ejector assembly 40 is in a reset state, awaiting a signal from the injection molding machine to trigger the ejection action. The fixed mold assembly 10, together with the moving mold assembly 20, forms the complete cavity of the product, responsible for molding the external contour and surface features of the product. In addition to participating in cavity formation, the moving mold assembly 20 also serves as the supporting foundation for the slider assembly 30 and the ejector assembly 40, providing a structural framework for mold movement and molding. The slider assembly 30 is specifically used to mold complex internal structures of the product, such as holes or grooves, and achieves demolding of internal features by sliding backward during mold opening, preventing product damage. The ejector assembly 40 is responsible for pushing the molded product out of the moving mold assembly 20 after mold opening, realizing automatic product detachment, which is convenient for subsequent collection or robot removal.

[0029] When the mold closes, the fixed mold assembly 10 and the moving mold assembly 20 are closed, and the slider assembly 30 is locked in the molding position. The injection molding machine injects molten plastic into the product cavity formed by the fixed mold assembly 10 and the moving mold assembly 20. After holding pressure and cooling, the mold opens. The fixed mold assembly 10 remains fixed, the moving mold assembly 20 moves backward, and the slider assembly 30 slides backward under the action of an external drive such as a guide post or spring, gradually separating from the internal structure of the product. When the mold opens to a certain distance, the slider assembly 30 completes demolding and is fixed by the positioning mechanism. Subsequently, the ejector assembly 40 is activated by the injection molding machine's ejection system and moves forward to eject the product from the moving mold assembly 20. A robot arm may intervene to remove the product and the sprue. Finally, during the mold closing process, the slider assembly 30 and the ejector assembly 40 automatically reset, ready for the next injection cycle.

[0030] Traditional powder suction nozzle core production relies on external procurement and CNC lathe machining, resulting in long procurement cycles and high costs. In contrast, the mold in this embodiment enables internal mass production. The fixed mold assembly 10 and the moving mold assembly 20 ensure the external molding of the product, the slider assembly 30 handles the complex internal structure, and the ejection assembly 40 achieves automatic demolding, thereby significantly shortening production time and reducing dependence on suppliers. At the same time, the injection molding process allows the use of low-cost materials, reducing raw material costs. Furthermore, the automated process improves production efficiency and product accuracy, avoiding clamping errors and deformation problems in traditional machining.

[0031] In a specific embodiment, the slider assembly 30 includes a slider body 31, an insert 32, and an insert pin 33. The insert 32 is fixed to the slider body 31, and the insert pin 33 is mounted on the insert 32.

[0032] Insert 32 is fixedly mounted on slider body 31 by hexagonal screws, forming a stable connection. Insert pin 33 is assembled on insert 32 and extends into the product cavity. More specifically, slider body 31, as the basic structure of slider assembly 30, is slidably set on moving mold assembly 20. Insert 32 is attached to a specific position on slider body 31, usually at its front end or side. Insert pin 33 is inserted vertically or obliquely from insert 32 to ensure accurate entry into the product cavity to form internal features during mold closing. Slider body 31 mainly provides structural support and sliding function, enabling the entire slider assembly 30 to move smoothly on moving mold assembly 20 and to achieve demolding by retraction during mold opening. Insert 32 is mainly used to fix and position insert pin 33, ensuring accurate installation position of insert pin 33, while facilitating maintenance and replacement, and improving mold durability. Insert pin 33 is directly responsible for forming the internal structure of the product, such as holes or grooves. It extends into the cavity to form specific features during mold closing and retracts with slider body 31 during mold opening, avoiding product damage.

[0033] During mold closing, the slider assembly 30 is locked in the forming position, and the insert pin 33 enters the product cavity to form the internal structure. During mold opening, the slider body 31 slides backward under external drive, driving the insert 32 and the insert pin 33 to move synchronously, allowing the insert pin 33 to be smoothly ejected from the product, achieving complete demolding of the internal features. This combination can produce the effect of efficiently forming complex internal structures, improving production speed and product consistency, while reducing clamping errors and deformation problems common in traditional processing, ultimately achieving mass production and cost reduction.

[0034] In a specific embodiment, the slider assembly 30 further includes an inclined guide post 34 and a spring 35. The inclined guide post 34 is disposed on the fixed mold assembly 10, and the spring 35 is disposed on the slider body 31. The inclined guide post 34 is used to drive the slider body 31 to retract when the mold is opened, and the spring 35 is used to assist the slider body 31 to retract and reset.

[0035] The inclined guide post 34 is mainly used to drive the slider body 31 to slide backward during mold opening through the interaction between its inclined surface and the slider body 31, thereby achieving demolding of the internal structure. The spring 35 is used to assist the backward movement of the slider body 31 and to provide a restoring force during mold closing, ensuring that the slider assembly 30 can smoothly return to its initial position. More specifically, the inclined guide post 34 is fixed on the fixed mold assembly 10, usually installed in the fixed mold plate, and passes through the guide hole on the slider body 31, so that the movement of the inclined guide post 34 during mold opening can directly push the slider body 31 to move backward laterally. The spring 35 is set inside or on the side of the slider body 31, and is guided by the spring positioning pin to compress or extend linearly. One end abuts against the slider body 31, and the other end abuts against the fixed part of the moving mold assembly 20 to store and release energy.

[0036] When the two work together, in the initial stage of mold opening, the inclined guide post 34 begins to drive the slider body 31 backward, while the spring 35 is compressed, accumulating elastic force to enhance the backward movement. When the mold opens to a certain position, the inclined guide post 34 completely disengages from the slider body 31, and the spring 35 continues to push the slider to ensure complete demolding. During mold closing, the spring 35 releases its stored energy, assisting the slider body 31 to smoothly return to its original position under the guidance of the inclined guide post 34, ensuring the mold is ready for the next injection. This combination not only improves the reliability and efficiency of demolding but also reduces the risk of slider jamming, thereby enhancing production stability and product consistency.

[0037] In a specific embodiment, the slider assembly 30 further includes a positioning pin 36, which is disposed on the slider body 31 and is used to guide the linear movement of the spring 35.

[0038] A locating pin 36 is mounted on the slider body 31 and fixed within its internal structure via assembly. A spring 35 is fitted onto the locating pin 36, allowing the spring 35 to move linearly along the axis of the locating pin 36 during compression and extension. More specifically, this arrangement ensures that the spring 35 will not bend or shift under force, thus maintaining stable and reliable retraction and resetting of the slider assembly 30. Furthermore, guided by the locating pin 36, the linear movement of the spring 35 is precisely controlled, aiding in the smooth retraction and demolding of the slider body 31 during mold opening and accurate resetting during mold closing.

[0039] In a specific embodiment, the slider assembly 30 further includes a positioning block 37, which is disposed on the moving mold assembly 20 and is used to position the slider body 31 after mold opening.

[0040] The positioning block 37 is mounted on the moving mold assembly 20, specifically on the surface of the moving mold plate. It cooperates with the positioning groove on the slider body 31 through the mechanical locking principle, thereby achieving precise fixation of the slider body 31 after mold opening. More specifically, the positioning block 37 is usually made of wear-resistant material. Its protruding part automatically engages with the groove when the slider body 31 retracts to the designated position. The upward movement assisted by the spring locks the slider, preventing it from accidentally sliding or shifting after mold opening. This design ensures the stability of the slider assembly 30 during the demolding process, avoids product damage or mold failure caused by inaccurate slider movement, and ultimately improves production efficiency and product molding consistency.

[0041] In a specific embodiment, the ejection assembly 40 includes an ejector pin 41, an ejector plate 42, and an ejector roller 43. The ejector pin 41 is mounted on the ejector plate 42, and the ejector roller 43 is used to push the ejector plate 42, thereby driving the ejector pin 41 to eject the product.

[0042] Ejector pins 41 directly contact and push the molded product, allowing it to smoothly exit the cavity of the moving mold assembly 20 and preventing the product from adhering to the mold. Ejector plate 42 serves as a support and fixing structure, bearing the ejector pins 41 and evenly transmitting the ejection force to ensure a stable and reliable ejection process. Ejector rollers 43 connect to the ejection system of the injection molding machine, receiving external mechanical force and converting it into a pushing motion to drive the ejector plate 42. Ejector pins 41 are fixedly mounted on the ejector plate 42, typically through embedding or screw connections, ensuring they do not loosen during ejection. The ejector plate 42 is located inside the moving mold assembly 20 and connected to the moving mold plate through guide components such as a center support, allowing it to move smoothly within a certain range. Ejector rollers 43 extend from the injection molding machine into the ejection hole of the mold, directly contacting the bottom of the ejector plate 42 to form a force transmission path.

[0043] After the injection molding machine completes the mold opening, the ejector roller 43 moves forward, pushing the ejector plate 42. The ejector pin 41 moves forward synchronously with the ejector plate 42, contacts the product and ejects it from the moving mold assembly 20, thus achieving automated demolding.

[0044] In a specific embodiment, the ejector plate 42 includes a top plate 421 and a bottom plate 422, the top plate 421 and the bottom plate 422 are fixedly connected, and the ejector pin 41 is mounted on the top plate 421.

[0045] The top plate 421 and the bottom plate 422 are tightly connected by means such as screws to form a stable integral structure. The ejector pin 41 is directly mounted and fixed on the top plate 421, ensuring its accurate and stable position during ejection. More specifically, the top plate 421, as the upper part of the ejection assembly, is responsible for directly supporting and fixing the ejector pin 41, while the bottom plate 422, as the lower support, moves in coordination with the top plate 421, providing additional rigidity and evenly distributing the ejection force. This design improves the stability and reliability of the ejection system, prevents the ejector pin 41 from loosening or falling off during ejection, ensures smooth product demolding, and reduces the risk of production interruption and mold damage.

[0046] In a specific embodiment, the ejection assembly 40 further includes a return pin 44 and a return pin spring 45. The return pin 44 is mounted on the ejector plate 42, and the return pin spring 45 is sleeved on the return pin 44 to automatically reset the ejector plate 42 when the mold is closed.

[0047] The return pin 44 is fixedly mounted on the ejector plate 42. Its tail end is typically connected to the top plate 421 and bottom plate 422, while its head end is inserted into the moving mold plate for guidance. Its function is to ensure that the ejector plate 42 maintains a straight path during movement and is forcibly reset during mold closing. The return pin spring 45 is sleeved on the return pin 44, with one end pressing against the ejector plate 42 and the other end pressing against the moving mold plate or a fixed component. Its function is to store energy during mold opening using its elasticity and release it during mold closing, pushing the ejector plate 42 back to its initial position automatically. More specifically, this combination allows the return pin spring 45 to quickly and smoothly drive the ejector plate 42 to reset during mold closing, preventing the ejector pin 41 from becoming stuck and affecting the next injection, thereby improving production continuity and efficiency, and reducing mold wear or product defects caused by inaccurate reset.

[0048] In a specific embodiment, the ejection assembly 40 further includes a limiting post 46, which is mounted on the ejector plate 42 and is used to limit the ejection stroke of the ejector plate 42.

[0049] The limiting post 46 is fixedly installed on the top plate 421 of the ejector plate 42 and is connected by screws to ensure its stability. When the ejector plate 42 moves forward during the ejection process, the limiting post 46 will contact the moving template or fixed component, thereby preventing the ejector plate 42 from continuing to move forward and limiting its ejection stroke to a preset range.

[0050] In a specific embodiment, the fixed mold assembly 10 includes a fixed template 12 and a fixed mold insert 11, and the moving mold assembly 20 includes a moving template 22 and a moving mold insert 21. The fixed mold insert 11 is fixed to the fixed template 12, and the moving mold insert 21 is fixed to the moving template 22. The fixed mold insert 11 and the moving mold insert 21 cooperate to form a product cavity.

[0051] The fixed mold assembly 10 includes a fixed mold plate 12 and a fixed mold insert 11. The fixed mold plate 12 is the base plate of the fixed mold part and is mounted on the fixed worktable of the injection molding machine via a fixed mold fixing plate. The fixed mold insert 11 is fixed to the cavity position of the fixed mold plate 12 with hexagonal screws, and its function is to precisely mold a part of the external shape of the product. The moving mold assembly 20 includes a moving mold plate 22 and a moving mold insert 21. The moving mold plate 22 is mounted on the moving worktable of the injection molding machine via square iron and a moving mold fixing plate. The moving mold insert 21 is also fixed to the moving mold plate 22 with hexagonal screws, and its function is to cooperate with the fixed mold insert 11 to form a complete product cavity to form the final external contour of the product. When the mold is closed, the fixed mold insert 11 fixed to the fixed mold plate 12 and the moving mold insert 21 fixed to the moving mold plate 22 are tightly engaged to form a closed cavity space, into which molten plastic is injected and cooled to solidify.

[0052] In a specific embodiment, the injection mold further includes a robotic arm 50 for automatically removing the product 60 and the sprue 70, the robotic arm 50 being disposed between the fixed mold assembly 10 and the moving mold assembly 20.

[0053] In addition, the robotic arm 50 synchronizes signals with the injection molding machine via a PLC control system. When the injection molding machine completes mold opening, the robotic arm starts the sprue intake program.

[0054] After the mold opens, the robot arm 50 moves laterally from the injection molding machine into the open space formed by the fixed mold assembly 10 and the moving mold assembly 20. The robot arm 50 automatically grips and removes the product 60 and the sprue 70, clamping the sprue 70 with its grippers to remove both the product 60 and the sprue 70 from the mold. Furthermore, this combination allows the robot arm 50 to immediately take over the part removal task after the ejection assembly 40 completes ejection, achieving a seamless automated process. This effectively reduces manual intervention and downtime, improves production speed and product consistency, while reducing operational errors and material waste, ultimately supporting efficient and continuous batch production and optimizing overall cost control.

[0055] In addition, the fixed mold assembly 10 also includes a locating ring 13, which is mounted on the fixed mold platen. Its function is to guide and position the mold accurately to the designated position on the injection molding machine. The fixed mold assembly 10 also includes a nozzle 14, which is fixed in the fixed mold platen 12 with hexagonal screws and mounted in the fixed mold insert 11. Its function is to allow the molten plastic injected from the injection molding machine nozzle to smoothly enter the mold cavity through the nozzle 14. The moving mold assembly 20 also includes a pressure bar 23, which is mounted on the moving mold platen 22 with hexagonal screws 24. Its function is to stabilize the movement trajectory of the slider assembly 30 and prevent the slider from loosening or shifting. The ejector assembly 40 also includes a waste pin 47, which is mounted on the ejector platen. Its function is to prevent the accumulation of metal or plastic shavings by creating a gap, thus avoiding damage to the mold precision caused by debris between the ejector platen and the moving mold platen.

[0056] The mold's working process begins in the mold-closed state, where the fixed mold assembly 10 and the moving mold assembly 20 are tightly closed. The fixed mold insert 11 and the moving mold insert 21 cooperate to form the product cavity. The positioning ring 13 ensures that the mold is accurately positioned on the injection molding machine. The nozzle 14 guides the molten plastic from the injection molding machine into the cavity. After injection, the injection molding machine enters the holding pressure stage, where the plastic cools and solidifies within the cavity.

[0057] When the mold is opened, the moving mold assembly 20 begins to move backward, the fixed mold assembly 10 remains fixed, the inclined guide post 34 drives the slider body 31 of the slider assembly 30 to slide backward, the spring 35 assists the backward movement under the guidance of the positioning pin 36, so that the insert pin 33 is dislodged from the internal structure of the product, and at the same time the positioning block 37 is engaged in the groove of the slider body 31 to achieve precise positioning and prevent sliding deviation.

[0058] like Figure 6 and Figure 7 As shown, when the mold opening distance reaches 99mm-101mm, the slider assembly 30 completes internal demolding, as... Figure 8 and Figure 9 As shown, after the mold continues to open to 149mm-151mm, sufficient space is formed between the moving mold assembly 20 and the fixed mold assembly 10, and the ejector assembly 40 starts to work. The ejector roller 43 pushes the ejector plate 42 forward, and the ejector pin 41 moves with the top plate 421 and the bottom plate 422 and ejects the product from the moving mold insert 21. The limiting post 46 ensures that the ejection stroke does not exceed the preset range to avoid over-ejection. At the same time, the robot arm 50 is taken out and inserted into the mold space to clamp the sprue 70 and remove it together with the product 60. The debris pin 47 forms a gap under the bottom pin plate to prevent debris accumulation from affecting the operation of the ejector assembly 40.

[0059] During the mold closing process, the return pin 44 and the return pin spring 45 drive the ejector plate 42 to automatically reset. The inclined guide post 34 and the spring 35 work together to make the slider assembly 30 slide back to the initial position. The pressure bar keeps the slider moving smoothly. The whole cycle realizes fully automated production, improves efficiency and reduces manual intervention.

[0060] Example 2 This embodiment provides a powder suction nozzle core, such as Figure 12 and Figure 13 As shown, the powder suction nozzle core is made by the injection mold described in Example 1, and the powder suction nozzle core includes an internal hole that is injection molded in one step by the insert pin 33 of the slider assembly 30.

[0061] The powder suction nozzle core is made by the injection mold described in Example 1, wherein the internal hole of the powder suction nozzle core is directly formed in one injection process through the insert pin 33 of the slider assembly 30; more specifically, the insert pin 33 enters the product cavity when the mold is closed, forming the internal structural features of the powder suction nozzle core, without the need for step-by-step processing of the external and internal parts as in traditional CNC lathe machining; this one-time molding method can significantly improve production efficiency and product accuracy, avoid scrap problems caused by clamping errors and stress deformation, reduce raw material waste and labor costs, and support rapid mass production of complex internal structures.

[0062] In a specific embodiment, the powder suction nozzle core is made of polyamide 66 or nylon 66.

[0063] The powder suction nozzle core is made of PA66, namely polyamide 66 or nylon 66. During injection molding, this material forms the external structure of the product through the fixed mold insert 11 and the moving mold insert 21, while the internal hole features are formed in one step by the insert 33 of the slider assembly 30. Polyamide 66 has good wear resistance and chemical corrosion resistance, and can withstand the continuous erosion of powder coatings under compressed air. Its flexibility helps reduce the risk of brittle fracture. Compared to traditional polytetrafluoroethylene (PTFE), polyamide 66 is significantly cheaper, about one-quarter the price of raw materials. This material replacement can significantly reduce production costs while maintaining the reliability and durability of the product during use, thus reducing expenses.

[0064] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. An injection mold, characterized in that, The injection mold includes a fixed mold assembly, a moving mold assembly, a slider assembly, and an ejector assembly. The fixed mold assembly and the moving mold assembly cooperate to form a product cavity. The slider assembly is slidably disposed on the moving mold assembly and is used to form the internal structure of the product and to demold the internal structure when the mold is opened. The ejector assembly is used to eject the product from the moving mold assembly.

2. The injection mold according to claim 1, characterized in that, The slider assembly includes a slider body, an insert, and a pin. The insert is fixed to the slider body, and the pin is mounted on the insert.

3. The injection mold according to claim 2, characterized in that, The slider assembly also includes a slanted guide post and a spring. The slanted guide post is disposed on the fixed mold assembly, and the spring is disposed on the slider body. The slanted guide post is used to drive the slider body to retract during mold opening, and the spring is used to assist the slider body in retracting and resetting.

4. The injection mold according to claim 3, characterized in that, The slider assembly also includes a positioning pin, which is disposed on the slider body and is used to guide the linear movement of the spring.

5. The injection mold according to claim 3, characterized in that, The slider assembly also includes a positioning block, which is disposed on the moving mold assembly and is used to position the slider body after mold opening.

6. The injection mold according to claim 1, characterized in that, The ejection assembly includes an ejector pin, an ejector plate, and an ejector roller. The ejector pin is mounted on the ejector plate, and the ejector roller is used to push the ejector plate, thereby driving the ejector pin to eject the product.

7. The injection mold according to claim 6, characterized in that, The ejector plate includes a top plate and a bottom plate, the top plate and the bottom plate are fixedly connected, and the ejector pin is mounted on the top plate.

8. The injection mold according to claim 7, characterized in that, The ejection assembly also includes a return pin and a return pin spring. The return pin is mounted on the ejector plate, and the return pin spring is sleeved on the return pin to automatically reset the ejector plate when the mold is closed.

9. The injection mold according to claim 7, characterized in that, The ejection assembly also includes a limiting post, which is mounted on the ejector plate to limit the ejection stroke of the ejector plate.

10. The injection mold according to claim 1, characterized in that, The fixed mold assembly includes a fixed template and a fixed mold insert, and the moving mold assembly includes a moving template and a moving mold insert. The fixed mold insert is fixed to the fixed template, and the moving mold insert is fixed to the moving template. The fixed mold insert and the moving mold insert cooperate to form a product cavity.

11. The injection mold according to claim 1, characterized in that, The injection mold also includes a robotic arm for automatically removing the product and sprue, the robotic arm being positioned between the fixed mold assembly and the moving mold assembly.

12. A powder suction nozzle core, characterized in that, The powder suction nozzle core is made of the injection mold according to any one of claims 1-11, and the powder suction nozzle core includes an internal hole that is injection molded in one step by the insert pin of the slider assembly.

13. The powder suction nozzle core according to claim 12, characterized in that, The powder suction nozzle core is made of polyamide 66 or nylon 66.

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