An insert injection mold

Abstract

The application discloses an embedded injection mold and relates to the technical field of mold injection, which comprises an upper mold group, a lower mold group is installed below the upper mold group, an embedded auxiliary mechanism is arranged below the lower mold group, the embedded auxiliary mechanism comprises upper moving plates and upper assembly pipelines which are symmetrically arranged below an embedded main body, the lower assembly pipelines are communicated with lower assembly pipelines below the upper assembly pipelines, lower moving plates are installed in the lower assembly pipelines, the upper moving plates form closed chambers with the upper assembly pipelines in the moving process, negative pressure generated by the chambers is transmitted to the embedded part through a hole element, a multilevel round hole pipe of the hole element is adapted to the profile of an irregular embedded part according to height difference, adsorption is first performed from the edge and then transition is made to the center, single-point stress leading to deformation of the embedded part is avoided, meanwhile, the non-contact adsorption reduces direct friction between a positioning component and the embedded part, wear problems of traditional positioning pins are avoided, frequent maintenance and replacement are not needed, long-term positioning accuracy is ensured, and production interruption time is reduced.

Description

Technical Field

[0001] This invention relates to the field of mold injection technology, specifically to an embedded injection mold. Background Technology

[0002] Embedded injection molds are a special type of mold structure in the field of injection molding. They are mainly used to produce products that require the integration of pre-formed inserts made of metal, plastic, ceramics, etc., with a plastic matrix. Their core feature is that the inserts are precisely bonded to the molten plastic through mold design. They are widely used in industries such as electronics, automobiles, and medical devices, for example, plastic parts with metal threads and plastic electronic housings with pins.

[0003] However, the existing technology still has the following defects in practical use: 1. The existing technology uses a rigid constraint method of positioning pin and slot to position the insert. As the core components of the mold and insert contact, the positioning pin and slot need to be accurately fixed in each injection cycle. Long-term high-frequency insertion and removal and friction will cause the metal surface to wear down gradually. Especially when the insert material has high hardness or is irregular in shape, it will accelerate the wear process of the positioning mechanism. At the same time, when the insert is placed manually, the operator's skill level, physical condition and concentration are different, which can easily lead to operational errors such as the insert not being fully inserted into the positioning groove or angular deviation.

[0004] Wear and tear on the positioning mechanism can lead to a continuous decrease in positioning accuracy, causing slight displacement of the insert during injection molding. This can result in dimensional deviations in the product, and in severe cases, scrapping the product, increasing production costs. Insert positioning offsets caused by human error can easily lead to exposed inserts or gaps at the joint with the plastic, affecting not only the product's appearance but also weakening its structural strength and reducing its lifespan. Furthermore, frequent maintenance and replacement work consumes a significant amount of production time, reduces equipment utilization, and further restricts production efficiency.

[0005] 2. Regarding the injection molding process and venting issues, the cavity space around the insert is usually quite narrow. The molten plastic needs to flow around the insert during the filling process, which leads to a longer melt flow and increased pressure loss. Furthermore, when the melt from different directions reaches the confluence point, the temperature drops, and due to viscosity differences, it is easy to fail to fully fuse, forming cold shuts. At the same time, air in the narrow space is difficult to expel quickly. If the venting groove design of traditional molds is not optimized for the insert position, it will lead to air accumulation, which will form bubbles under the action of injection pressure. In addition, the added insert placement process in embedded injection molding prolongs the production cycle and accelerates the cooling rate of the melt in the cavity, further increasing the probability of cold shuts.

[0006] Cold shuts can cause unfused areas at the junction of inserts and plastic, weakening the bond strength and making the product prone to breakage at the junction under stress, posing a serious quality hazard. The presence of air bubbles not only damages the integrity of the product's appearance but also creates stress concentration points inside, reducing the product's mechanical properties and making it unable to meet the requirements of high-intensity use scenarios. At the same time, the extended cycle time significantly reduces the production capacity per unit time, while the increased mold costs and high maintenance expenses further compress the company's profit margins and reduce the product's competitiveness in the market.

[0007] Therefore, in view of this, the present invention proposes an embedded injection mold to make up for and improve the deficiencies of the prior art. Summary of the Invention

[0008] To address the aforementioned technical problems, this invention provides an embedded injection mold to solve the technical problems mentioned in the background section.

[0009] To achieve the above objectives, the technical solution adopted by the present invention is as follows: an embedded injection mold for injection molding an insert body, comprising an upper mold assembly, a lower mold assembly installed below the upper mold assembly, an embedded auxiliary mechanism disposed below the lower mold assembly, the embedded auxiliary mechanism comprising an upper movable plate and an upper assembly pipe symmetrically distributed below the insert body, the lower assembly pipe being connected to a lower assembly pipe, and a lower movable plate being installed inside the lower assembly pipe.

[0010] The embedded auxiliary mechanism operates in two stages. The first stage corresponds to the equipment positioning process. When the embedded auxiliary mechanism is in the first stage, the upper moving plate gradually moves downward inside the upper assembly pipe until it is attached to the upper moving plate. This process provides a flexible initial positioning of the insert body. The second stage corresponds to the equipment injection molding process. When the embedded auxiliary mechanism is in the second stage, the upper moving plate and the lower moving plate move downward synchronously inside the lower assembly pipe until they are at the bottom of the lower assembly pipe. This process strengthens the positioning force and removes air from around the insert body.

[0011] Furthermore, the embedded auxiliary mechanism also includes a drive cylinder, the outer wall of the output end of the drive cylinder is movably connected to an assembly base plate, the upper surface of the assembly base plate is symmetrically fixedly connected to a through slide shaft, the upper moving plates are all fixedly connected to the uppermost end of the through slide shaft, and the output end of the drive cylinder is in an extended state in the initial state.

[0012] Furthermore, upper protrusions are uniformly and fixedly connected to the lower surface of the upper movable plate, and lower protrusions are fixedly connected to the corresponding areas on the upper surface of the lower movable plate.

[0013] Furthermore, the upper protrusions are all trapezoidal in shape, narrower at the bottom and wider at the top, and the lower protrusions are all isosceles triangular in shape, with the tips of the lower protrusions facing upwards. When the upper and lower protrusions are in a fitted state, each upper protrusion is located in the gap area between two adjacent lower protrusions.

[0014] Furthermore, the upper movable plate is slidably connected to the upper assembly pipe, and in the initial state, the upper movable plate is located above the interior of the upper assembly pipe. The output end of the upper assembly pipe is rotatably connected to a turntable, and a perforated component is installed through the surface of the turntable.

[0015] Furthermore, the perforated component adopts a multi-level circular tube combination structure design. With the center of the rotary table as the layout reference, the circular tubes in the perforated component are divided into three layers: outer, middle and inner. The upper end faces of the circular tubes are coplanar, and the height of the lower end face decreases sequentially along the layer order of outer, middle and inner layers.

[0016] Furthermore, the lower moving plate is slidably connected to the lower assembly pipe, and in the initial state, the lower moving plate is located above the interior of the lower assembly pipe. A limiting slide cylinder is fixedly connected to the lower surface of the lower moving plate, and the through slide shaft is slidably connected to the interior of the limiting slide cylinder.

[0017] Furthermore, the upper assembly pipe and the lower assembly pipe are of equal length, and the ratio of their radii is 1:2. Similarly, the ratio of the radii of the upper moving plate and the lower moving plate is also 1:2.

[0018] Furthermore, a connecting curved pipe is uniformly connected above the lower assembly pipe, and the upper assembly pipe is evenly distributed around the connecting curved pipe. The output ends of the connecting curved pipe are all designed to be inclined, with the inclination direction being away from the upper assembly pipe.

[0019] Furthermore, an external sleeve is fixedly connected to the upper surface of the lower assembly pipe, and a positioning disc is rotatably connected to the outside of the external sleeve. The positioning disc is fixedly connected to the connecting curved pipe.

[0020] Compared with the prior art, the beneficial effects of the present invention are: (1) The device takes the hole-shaped component at the output end of the upper assembly pipe as the core and achieves flexible positioning through negative pressure adsorption. During the downward movement of the upper moving plate, a closed cavity is formed with the upper assembly pipe. The negative pressure generated is transmitted to the insert through the hole-shaped component. The multi-level round hole tubes of the hole-shaped component are adapted to the contour of the irregular insert according to the height difference. It first adsorbs from the edge and then transitions to the center, avoiding the deformation of the insert caused by single-point force. It does not require manual precise alignment and greatly reduces the operation error. At the same time, this non-contact adsorption reduces the direct friction between the positioning component and the insert, avoids the wear problem of traditional positioning pins, and does not require frequent maintenance and replacement. It not only ensures long-term positioning accuracy but also reduces production interruption time, solving the defects of rapid decline in positioning accuracy, high maintenance cost and poor adaptability in the prior art.

[0021] (2) During the injection molding stage, the movement of the integrated moving plate in the lower assembly pipe simultaneously achieves positioning reinforcement and air discharge, effectively making up for the shortcomings of insufficient positioning stability and incomplete air discharge in the prior art. In the prior art, the impact of molten plastic easily causes the insert to shift, and the narrow cavity around the insert easily accumulates air to form bubbles and cold shuts. In this device, after the upper moving plate and the lower moving plate form an integrated structure by the engagement of the protrusions, they move down synchronously in the lower assembly pipe. The larger volume of the closed chamber generates stronger negative pressure, which, combined with the guidance of the limiting slide and the through slide shaft, It can stably resist injection pressure, prevent insert displacement, and ensure molding accuracy. At the same time, the connecting curved pipe connected to the lower assembly pipe and the perforated part form a coordinated exhaust path. The negative pressure quickly draws out the air between the modules and around the insert through the connecting curved pipe. The airflow is unidirectional to avoid backflow, effectively removes residual air in narrow spaces, and reduces the generation of bubbles. Moreover, the smooth exhaust speeds up the melt filling speed, reduces the probability of the melt forming a cold shut due to excessive cooling, strengthens the bonding strength between the insert and the plastic, and solves the problems of quality defects and insufficient structural strength in existing technologies.

[0022] The inclined design of the connecting curved tube output end, which is far from the upper assembly pipe, significantly optimizes exhaust efficiency and airflow stability. The inclined structure creates a unidirectional flow path "away from the positioning core area." When the integrated moving plate moves down and generates negative pressure, the air around the insert and in the module gap will quickly enter the connecting curved tube along the inclined direction and will not flow back to the insert positioning area near the upper assembly pipe, preventing the exhaust air from accumulating under the insert and affecting positioning accuracy. At the same time, the inclined design can be adapted to the exhaust hole layout of the mold cavity edge, allowing the airflow to be discharged more smoothly from the narrow space around the insert, reducing airflow resistance, avoiding the formation of bubbles due to residual air in the exhaust dead corner, and achieving unidirectional exhaust without the need for an additional check valve. This simplifies the structure while ensuring the continuity and reliability of exhaust during the injection molding process, further improving the product molding quality.

[0023] (3) In actual operation, the upper assembly pipe and the lower assembly pipe are designed with equal length and a radius ratio of 1:2. This allows for precise adjustment of the suction strength according to the functional requirements of different stages. In the initial positioning stage, the upper assembly pipe has a smaller radius, and the closed chamber volume formed with the upper moving plate is limited. The negative pressure generated during the downward movement is moderate. When the perforated parts act on the insert, they can form sufficient suction force to complete the initial positioning, while avoiding deformation or surface damage of irregular inserts due to excessive suction. This adapts to the needs of inserts with different materials and thicknesses. In the second stage of injection molding, the radius of the lower assembly pipe is larger than that of the upper assembly pipe. The assembly pipe is twice the size, and the chamber volume formed by the lower moving plate is larger. When the integrated moving plate moves downward, it can generate a negative pressure intensity significantly higher than that in the first stage. With the cooperation of the protrusion fitting and the sliding shaft guide, it can stably resist the impact pressure of molten plastic, prevent the insert from shifting during injection molding, and ensure molding accuracy. This suction level control achieved by the difference in pipe radius ratio does not require additional pressure regulating components. The functional requirements of different stages can be met by the structural design alone, which simplifies the complexity of the mechanism. At the same time, it avoids the defects of single suction strength being unable to take into account the positioning flexibility and stability, and improves the reliability and adaptability of the device operation.

[0024] The trapezoidal structure of the upper protrusion is paired with the isosceles triangular structure of the lower protrusion, and the design of the upper protrusion being embedded in the gap between adjacent lower protrusions can ensure motion accuracy from both guiding correction and mechanical limiting aspects. This solves the problems of easy misalignment of upper and lower parts and poor stability of integrated motion in the existing technology. When the upper moving plate moves down, the hypotenuse of the trapezoidal upper protrusion contacts the hypotenuse of the isosceles triangular lower protrusion first. The inclined surface cooperation can automatically correct the slight radial offset of the upper moving plate and ensure precise alignment of the upper and lower moving plates. After the upper protrusion is attached, it is embedded in the gap between the lower protrusions. The trapezoidal shape of "narrow at the bottom and wide at the top" can form a tight engagement with the triangular gap, restricting the relative displacement of the two and providing a reliable mechanical lock for integrated motion.

[0025] (4) Compared with the prior art, after injection molding is completed, when the drive cylinder drives the moving plate to reset, the negative pressure in the hole-drilling part and the connecting curved pipe gradually turns into a slight positive pressure. The positive pressure applies a uniform upward thrust to the insert through the hole-drilling part, which helps the insert to separate naturally from the cavity. At the same time, the airflow flows in the opposite direction to reduce the adhesion between the insert and the cavity. There is no need for manual forced demolding, which reduces the risk of insert damage, simplifies the operation steps, and shortens the demolding time. In terms of modification and adaptation, if the existing technology needs to upgrade the positioning mechanism, it often requires deep processing of the mold cavity, which is not only costly and time-consuming, but may also damage the original mold structure. However, this device integrates the core components such as pipes, moving plates, and cylinders into independent modules, which are directly fixed to the bottom of the lower mold group with bolts. There is no need to change the internal structure of the mold cavity. The modification process is simple and quick, which greatly reduces the technical difficulty and equipment investment cost. It can upgrade the equipment without bearing high modification costs and quickly adapt to the embedded injection molding needs, effectively improving the market applicability and promotion value of the device. Attached Figure Description

[0026] Figure 1 This is a front-view stereoscopic structural diagram of the present invention.

[0027] Figure 2 This is a side view schematic diagram of the structure of the present invention.

[0028] Figure 3 This is a schematic diagram of the three-dimensional structure of the insert body of the present invention.

[0029] Figure 4 This is a three-dimensional structural diagram of the embedded auxiliary mechanism of the present invention.

[0030] Figure 5 This is a schematic diagram of the internal three-dimensional structure of the external sleeve of the present invention.

[0031] Figure 6 This is a schematic diagram of the internal three-dimensional structure of the upper and lower assembly pipes of the present invention.

[0032] Figure 7 This is a three-dimensional structural diagram illustrating the positional relationship between the through-slide shaft and the limiting slide cylinder of the present invention.

[0033] Figure 8 This is a top-view three-dimensional structural diagram of the hole-drilling component of the present invention.

[0034] Figure 9 This is a side view cross-sectional diagram of the hole-drilling component of the present invention.

[0035] Figure 10 This is a schematic diagram of the initial state planar structure of the embedded auxiliary mechanism of the present invention.

[0036] Figure 11 This is a schematic diagram of the first stage planar structure of the embedded auxiliary mechanism of the present invention.

[0037] Figure 12 This is a schematic diagram of the second stage planar structure of the embedded auxiliary mechanism of the present invention.

[0038] The following are the labels in the diagram: 1. Upper module; 11. Lower module; 12. Insert body; 2. Embedded auxiliary mechanism; 21. Drive cylinder; 22. Assembly base plate; 23. Through slide shaft; 24. Upper moving plate; 25. Upper protrusion; 26. Upper assembly pipe; 27. Turntable; 28. Hole-drilling component; 29. ​​Lower assembly pipe; 210. Lower moving plate; 211. Lower protrusion; 212. Limiting slide cylinder; 213. Connecting curved pipe; 214. External sleeve; 215. Positioning disc. Detailed Implementation

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

[0040] It should be noted that the structure and working principle of the above-mentioned upper module 1, lower module 11, insert body 12 and other components are existing technologies and will not be described in detail here.

[0041] Example 1: Please refer to Figure 1 - Figure 12 As shown, an embedded injection mold is used to perform injection molding on an insert body 12. It includes an upper mold 1, a lower mold 11 installed below the upper mold 1, and an embedded auxiliary mechanism 2 disposed below the lower mold 11. The embedded auxiliary mechanism 2 includes an upper movable plate 24 and an upper assembly pipe 26 symmetrically distributed below the insert body 12. A lower assembly pipe 29 is connected to the lower part of the upper assembly pipe 26, and a lower movable plate 210 is installed inside the lower assembly pipe 29.

[0042] It should be noted that the embedded auxiliary mechanism 2 operates in two stages. The first stage of the embedded auxiliary mechanism 2 corresponds to the device positioning process. When the embedded auxiliary mechanism 2 is in the first stage, the upper moving plate 24 gradually moves downward inside the upper assembly pipe 26 until the upper moving plate 24 is attached to the upper moving plate 210. This process performs a flexible preliminary positioning of the insert body 12.

[0043] Please refer to Figure 1 - Figure 12As shown, the embedded auxiliary mechanism 2 also includes a drive cylinder 21. An assembly base plate 22 is movably connected to the outer wall of the output end of the drive cylinder 21. A through-slide shaft 23 is symmetrically fixedly connected to the upper surface of the assembly base plate 22. Upper moving plates 24 are all fixedly connected to the uppermost end of the through-slide shaft 23. Initially, the output end of the drive cylinder 21 is in an extended state. Upper protrusions 25 are uniformly fixedly connected to the lower surface of the upper moving plate 24. Lower protrusions 211 are fixedly connected to the area on the upper surface of the lower moving plate 210 corresponding to the upper protrusions 25. The upper protrusions 25 are generally trapezoidal in shape, narrower at the bottom and wider at the top. The lower protrusions 211 are all isosceles triangular in shape, with the tips of the lower protrusions 211 pointing upwards. When the upper protrusions 25 and... When the lower protrusion 211 is in a fitted state, each upper protrusion 25 is located in the gap area between two adjacent lower protrusions 211. The upper moving plate 24 is slidably connected to the upper assembly pipe 26. In the initial state, the upper moving plate 24 is located above the interior of the upper assembly pipe 26. The output end of the upper assembly pipe 26 is rotatably connected to the turntable 27. The surface of the turntable 27 is through-mounted with a perforated component 28. The perforated component 28 adopts a multi-level round hole tube combination structure design. With the center of the turntable 27 as the layout reference, several round hole tubes in the perforated component 28 are divided into three layers: outer, middle and inner. The upper end faces of several round hole tubes are coplanar, and the height of the lower end face decreases sequentially along the layer order of outer layer, middle layer and inner layer.

[0044] Specifically, in the first stage: the upper moving plate 24 moves down to achieve the initial positioning of the insert body 12 through the perforated part 28. In the initial state, the output end of the drive cylinder 21 is in the extended state, the upper moving plate 24 is located above the inside of the upper assembly pipe 26, and the upper protrusion 25 and the lower protrusion 211 are in the separated state. When entering the first stage of positioning process, the output end of the drive cylinder 21 gradually retracts, driving the through sliding shaft 23 to move down, and then driving the upper moving plate 24 to slide axially downward in the upper assembly pipe 26.

[0045] During this process, the sliding fit between the upper moving plate 24 and the upper assembly pipe 26 forms a closed chamber. As the upper moving plate 24 moves downward, the volume inside the chamber increases, generating negative pressure. The negative pressure is transmitted to the insert body 12 through the perforated parts 28 on the surface of the turntable 27. The multi-level round hole tubes of the perforated parts 28 have different distances from the insert body 12 due to the decreasing height of the lower end face from the outer layer to the inner layer. The lower end of the outer round hole tube is closer to the edge of the insert body 12, while the inner layer is closer to the center. This structure allows the negative pressure to act first on the edge area of ​​the insert body 12, i.e., the outer round hole tube, to generate suction first, and then gradually transition to the center area. The middle and inner round hole tubes participate in turn, realizing a gradual adsorption "from the edge to the center", avoiding irregular insert deformation caused by strong suction at a single point.

[0046] Meanwhile, as the upper moving plate 24 moves downward, the trapezoidal upper protrusion 25 on its lower surface gradually approaches the isosceles triangular lower protrusion 211 on the lower moving plate 210. The guide cooperation between the hypotenuse of the trapezoid and the hypotenuse of the triangle can correct the slight radial offset of the upper moving plate 24 and ensure uniform negative pressure distribution. When the two are in contact, the upper protrusion 25 is embedded in the gap of the adjacent lower protrusion 211, forming a mechanical limit, and the negative pressure completes the flexible initial positioning of the insert body 12.

[0047] Please refer to Figure 1 - Figure 12 As shown, the second stage of the embedded auxiliary mechanism 2 corresponds to the injection molding process of the equipment. When the embedded auxiliary mechanism 2 is running in the second stage, the upper moving plate 24 and the lower moving plate 210 work together to move downward inside the lower assembly pipe 29 until they are at the bottom of the lower assembly pipe 29. This process strengthens the positioning force on the one hand and removes the air around the insert body 12 on the other.

[0048] It should be noted that the lower moving plate 210 is slidably connected to the lower assembly pipe 29, and in the initial state, the lower moving plate 210 is located above the interior of the lower assembly pipe 29. The lower surface of the lower moving plate 210 is fixedly connected to the limiting slide cylinder 212, and the through slide shaft 23 is slidably connected inside the limiting slide cylinder 212. The upper assembly pipe 26 and the lower assembly pipe 29 are of equal length, and the radius ratio of the upper assembly pipe 26 to the lower assembly pipe 29 is 1:2. Similarly, the radius ratio of the upper moving plate 24 to the lower moving plate 210 is also 1:2. The upper part of the lower assembly pipe 29 is uniformly connected to the connecting curved pipe 213. The connecting curved pipe 213 is evenly distributed with the upper assembly pipe 26 as the center, and the output end of the connecting curved pipe 213 is inclined, with the inclination direction being away from the side of the upper assembly pipe 26. The upper surface of the lower assembly pipe 29 is fixedly connected to the outer sleeve 214, and the outer part of the outer sleeve 214 is rotatably connected to the positioning disc 215. The positioning disc 215 is fixedly connected to the connecting curved pipe 213.

[0049] Specifically, in the second stage: the integrated moving plate moves down synchronously to achieve positioning reinforcement and venting: when entering the second stage of injection molding, the upper moving plate 24 and the lower moving plate 210 form an integrated structure through the fit of the upper protrusion 25 and the lower protrusion 211 and mechanical limiting, driving the cylinder 21 to continue to gradually contract, driving the integrated moving plate to move down synchronously along the lower assembly pipe 29.

[0050] In terms of positioning enhancement: the radius of the lower assembly pipe 29 is twice that of the upper assembly pipe 26. When the integrated moving plate moves down, the lower moving plate 210 and the lower assembly pipe 29 form a larger closed chamber, and the resulting negative pressure intensity is significantly higher than that in the first stage. At the same time, the sliding fit between the limiting slide cylinder 212 and the through slide shaft 23 restricts the radial sway of the integrated moving plate. Combined with the interlocking and limiting of the upper protrusion 25 and the lower protrusion 211, it ensures that the negative pressure acts stably on the insert body 12, which can resist the impact pressure of the molten plastic during injection molding and achieve high-strength positioning.

[0051] In terms of exhaust: The connecting curved pipe 213 above the lower assembly pipe 29 is evenly distributed around the assembly pipe 26, and the output end is inclined away from the center. When the integrated moving plate moves down, the negative pressure in the lower assembly pipe 29 is transmitted to the exhaust hole of the mold cavity through the connecting curved pipe 213. Due to the inclined design of the connecting curved pipe 213, the airflow flows unidirectionally along the path of "insert periphery → drainage hole 28 → connecting curved pipe 213 → lower assembly pipe 29", which can efficiently exhaust the residual air between the insert body 12 and the cavity. At the same time, the multi-layer round hole pipe of the drainage hole 28 continuously assists in the extraction of gas near the surface of the insert through negative pressure. The two work together to avoid the generation of bubbles or cold shuts during injection molding.

[0052] Summary of the motion states and processes of each component: As the sole core power source, the operating state of the drive cylinder 21 directly governs the phase switching of the mechanism and is the "power center" for the realization of the function: In the initial state, the output end of the drive cylinder 21 is in the maximum extension state, which forms an upward support for the symmetrically distributed through-slide shaft 23 through the mounting base plate 22, so that the upper moving plate 24 is stably stationed above the inside of the upper assembly pipe 26; When the first stage positioning process is started, the cylinder output end receives the signal and precisely retracts, and transmits the axial force to the through-slide shaft 23 through the mounting base plate 22, which drives the upper moving plate 24 to move down at a constant speed along the axis of the upper assembly pipe 26; At the end of the first stage, when the upper protrusion 25 and the lower protrusion 211 are fitted together, the cylinder enters the second stage of operation, the output end continues to retract, and the power is transmitted to the lower moving plate 210 through the upper moving plate 24, driving the integrated structure formed by the two to move down synchronously along the lower assembly pipe 29 until it reaches the bottom of the lower assembly pipe 29. The cylinder output force can be finely adjusted through the pneumatic system throughout the process to adapt to the positioning strength requirements of different insert bodies 12.

[0053] The sliding fit and protrusion engagement of the upper and lower moving plates with their corresponding pipes are key to the functional connection: the sliding fit between the upper moving plate 24 and the upper assembly pipe 26 quickly forms a low-pressure strong negative pressure in the first stage, achieving flexible positioning; the inclined guide and gap engagement between the upper protrusion 25 and the lower protrusion 211 complete the mechanical locking at the end of the first stage, providing a structural basis for the integrated movement in the second stage; the sliding fit between the lower moving plate 210 and the lower assembly pipe 29 in the second stage forms a high-pressure strong negative pressure, which both strengthens positioning and assists in exhaust.

[0054] After injection molding, the auxiliary mechanism reset and demolding process is as follows: After injection molding, the output end of the drive cylinder 21 extends, driving the integrated moving plate to reset upward: First, the lower moving plate 210 moves upward along the lower assembly pipe 29 to the initial position, and then the upper moving plate 24 moves upward along the upper assembly pipe 26, separating from the lower moving plate 210. The upper protrusion 25 disengages from the gap of the lower protrusion 211. During this process, the negative pressure of the hole-draining component 28 and the connecting curved pipe 213 gradually disappears and turns into a slight positive pressure, which can apply an upward thrust to the insert body 12 to assist it in separating from the mold cavity. At the same time, when the upper moving plate 24 moves upward, the airflow of the hole-draining component 28 flows in the opposite direction, further reducing the adhesion between the insert and the cavity. Finally, all components return to the initial state, completing the demolding assistance and mechanism reset.

[0055] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An embedded injection mold for injection molding an insert body (12), comprising an upper mold assembly (1) and a lower mold assembly (11) mounted below the upper mold assembly (1), characterized in that: An embedded auxiliary mechanism (2) is provided below the lower module (11). The embedded auxiliary mechanism (2) includes an upper moving plate (24) and an upper assembly pipe (26) symmetrically distributed below the insert body (12). A lower assembly pipe (29) is connected below the upper assembly pipe (26). A lower moving plate (210) is installed inside the lower assembly pipe (29). The embedded auxiliary mechanism (2) operates in two stages. The first stage of the embedded auxiliary mechanism (2) corresponds to the equipment positioning process. When the embedded auxiliary mechanism (2) is in the first stage, the upper moving plate (24) gradually moves downward inside the upper assembly pipe (26) until the upper moving plate (24) is attached to the upper moving plate (210). This process performs a flexible preliminary positioning of the insert body (12). The second stage of the embedded auxiliary mechanism (2) corresponds to the equipment injection molding process. When the embedded auxiliary mechanism (2) is in the second stage, the upper moving plate (24) and the lower moving plate (210) work together to move downward inside the lower assembly pipe (29) until they are at the bottom of the lower assembly pipe (29). The embedded auxiliary mechanism (2) also includes a drive cylinder (21). The outer wall of the output end of the drive cylinder (21) is movably connected to an assembly base plate (22). The upper surface of the assembly base plate (22) is symmetrically fixedly connected to a through slide shaft (23). The upper moving plates (24) are all fixedly connected to the uppermost end of the through slide shaft (23). In the initial state, the output end of the drive cylinder (21) is in an extended state. The upper movable plate (24) is slidably connected to the upper assembly pipe (26), and in the initial state, the upper movable plate (24) is located above the interior of the upper assembly pipe (26). The output end of the upper assembly pipe (26) is rotatably connected to a turntable (27), and a perforated part (28) is installed through the surface of the turntable (27). The lower moving plate (210) is slidably connected to the lower assembly pipe (29), and in the initial state, the lower moving plate (210) is located above the interior of the lower assembly pipe (29). The lower surface of the lower moving plate (210) is fixedly connected to the limiting slide cylinder (212), and the through slide shaft (23) is slidably connected to the interior of the limiting slide cylinder (212). The upper assembly pipe (26) and the lower assembly pipe (29) are of equal length, the ratio of the radius of the upper assembly pipe (26) and the lower assembly pipe (29) is one to two, and the ratio of the radius of the upper moving plate (24) and the lower moving plate (210) is one to two. The lower assembly pipe (29) is uniformly connected to a connecting curved pipe (213), which is evenly distributed around the upper assembly pipe (26). The output ends of the connecting curved pipe (213) are all inclined, with the inclination direction being away from the upper assembly pipe (26).

2. An embedded injection mold according to claim 1, characterized in that: The lower surface of the upper movable plate (24) is uniformly fixedly connected with upper protrusions (25), and the area on the upper surface of the lower movable plate (210) corresponding to the upper protrusions (25) is fixedly connected with lower protrusions (211).

3. An embedded injection mold according to claim 2, characterized in that: The upper protrusion (25) is generally in the shape of a trapezoid with a narrow bottom and a wide top, and the lower protrusion (211) is in the shape of an isosceles triangle with the tip of the lower protrusion (211) facing upward. When the upper protrusion (25) and the lower protrusion (211) are in a close fit, each upper protrusion (25) is located in the gap area between two adjacent lower protrusions (211).

4. An embedded injection mold according to claim 1, characterized in that: The perforated component (28) adopts a multi-level circular tube combination structure design. With the center of the rotating disk (27) as the layout reference, the circular tubes in the perforated component (28) are divided into three layers: outer, middle and inner. The upper end faces of the circular tubes are coplanar, and the height of the lower end face decreases sequentially along the layer order of outer, middle and inner layers.

5. An embedded injection mold according to claim 1, characterized in that: An external sleeve (214) is fixedly connected to the upper surface of the lower assembly pipe (29), and a positioning disc (215) is rotatably connected to the outside of the external sleeve (214). The positioning disc (215) is fixedly connected to the connecting curved pipe (213).

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