A TFT screen bracket injection mold
By adopting the raised structure of the moving mold core and the molding groove design in the injection mold of the TFT screen bracket, combined with the conical gate and ejector pin assembly, the problem of excessively long plastic flow path in traditional molds is solved, achieving efficient molding and high-quality demolding.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUIZHOU FUZE PRECISION COMPONENTS CO LTD
- Filing Date
- 2025-09-22
- Publication Date
- 2026-07-31
AI Technical Summary
The traditional mold gating system design results in an excessively long plastic flow path, increasing pressure loss and temperature drop, which affects molding quality and production efficiency.
A TFT screen bracket injection mold was designed, including a fixed mold mechanism, a moving mold mechanism and a gating system. The moving mold core adopts a raised structure and molding groove design, combined with a conical gating gate and ejector pin assembly, to shorten the plastic flow path and improve molding accuracy and demolding efficiency.
By shortening the plastic flow path, reducing pressure loss and temperature drop, injection molding efficiency and quality are improved, ensuring that the product fills the molding groove in a short time, reducing molding defects, and improving demolding efficiency and product consistency.
Smart Images
Figure CN224576074U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of TFT screen bracket manufacturing technology, specifically to a TFT screen bracket injection mold. Background Technology
[0002] In the field of electronic device manufacturing, TFT (Thin Film Transistor) screens are widely used as an important display component in various products such as mobile phones, tablets, and monitors. The TFT screen bracket, as a key component supporting and fixing the TFT screen, directly affects the performance and manufacturing cost of the entire electronic device due to its quality and production efficiency.
[0003] Traditional mold gating system designs have flaws, the most common being that the plastic flow path is too long. The plastic needs to pass through complex channels from the injection molding machine to the mold forming space. This not only increases the pressure loss of the plastic during the flow process, making it difficult for the plastic to fill the various parts of the mold evenly, and easily causing molding defects such as bubbles and shrinkage marks; it also causes the plastic temperature to drop too quickly, affecting its fluidity, prolonging the injection time, and reducing production efficiency. Utility Model Content
[0004] The purpose of this invention is to provide a TFT screen bracket injection mold with high molding precision, which can shorten the flow path of plastic and thus improve injection molding efficiency.
[0005] A TFT screen bracket injection mold includes a fixed mold mechanism, a moving mold mechanism, and a gating system, wherein the fixed mold mechanism is movably connected to the moving mold mechanism. The moving mold mechanism includes a moving template and a moving mold core. The moving mold core is connected to the moving template. The moving mold core includes a protruding structure and a forming groove surrounding the outer periphery of the protruding structure. The side of the protruding structure is provided with several through holes. The gating system includes a nozzle, a main runner, and a branch runner. The nozzle is connected to the fixed mold mechanism and passes through the fixed mold mechanism to abut against the moving mold core. The main runner is connected to the nozzle, and the branch runner is connected to the main runner. The branch runner is embedded in the protruding structure, and the gating port on the branch runner passes through the through hole.
[0006] In the above scheme, the fixed mold mechanism and the moving mold mechanism are connected to form a complete TFT screen bracket molding space. The design of the raised structure of the moving mold core and the molding groove surrounding it can accurately shape and size the TFT screen bracket. The molten plastic enters the main runner through the nozzle and then enters the branch runner from the main runner. The branch runner is embedded in the raised structure, making the overall structure compact. The pouring port on the branch runner passes through the through hole on the side of the raised structure, directly introducing the molten plastic into the molding groove. This shortens the flow path of the plastic, reduces the pressure loss and temperature drop of the plastic during the flow process, reduces molding defects caused by uneven plastic flow, and ensures that the plastic can fill the entire molding groove in a short time, thus improving the efficiency and quality of injection molding production.
[0007] Furthermore, the gating gate is conical, and the angle between the central axis of the gating gate and the mold opening direction is greater than 0°.
[0008] In the above scheme, the sprue passes through the through hole to introduce molten plastic into the molding tank. Since the through hole is on the side of the raised structure, the angle between the central axis of the sprue and the mold opening direction is greater than 0°. This gives the sprue a certain tilt angle, which, together with the conical structure, facilitates the separation of the moving mold core from the gating system, thereby improving the demolding efficiency of the TFT screen bracket.
[0009] Furthermore, the moving mold mechanism also includes a base plate, an upper ejector plate, a lower ejector plate, and ejector pin assemblies. The upper ejector plate is connected to the base plate, the upper ejector plate is connected to the lower ejector plate, and several sets of ejector pin assemblies are connected to the lower ejector plate.
[0010] In the above scheme, the upper ejector plate is connected to the bottom plate, and the lower ejector plate is connected to the upper ejector plate. During demolding, the ejection power of the injection molding machine can be transmitted to the upper ejector plate through the bottom plate, and then evenly distributed to the lower ejector plate by the upper ejector plate. This allows several sets of ejector pin assemblies connected to the lower ejector plate to be ejected synchronously and smoothly. This smooth ejection avoids problems such as deformation and cracking of the product due to uneven local stress, and ensures that the product can be smoothly ejected from the mold cavity.
[0011] Furthermore, the diversion channel includes several positioning posts, and the protruding structure is provided with several positioning holes. The positioning posts are movably inserted through the positioning holes, and one set of the ejector pin assemblies movably abuts against the positioning posts.
[0012] In the above scheme, the cooperation between the positioning pin and the positioning hole provides a precise positioning reference for the mold assembly. During the mold assembly process, the positioning pin can be accurately inserted into the positioning hole, so that the relative position between the runner and the raised structure can be accurately fixed. This helps to ensure the positional accuracy between various parts of the mold. One set of ejector pins is in contact with the positioning pin. During the demolding process, the ejector pin assembly can apply an ejection force to the positioning pin, so that the positioning pin can be smoothly removed from the positioning hole. This design avoids the adhesion between the positioning pin and the raised structure, ensuring that the runner can separate from the moving mold core with the ejection action, thus improving the demolding efficiency.
[0013] Furthermore, the moving mold mechanism also includes a plurality of moving mold forming inserts, which pass through the moving mold core.
[0014] In the above solution, the TFT screen bracket needs to be formed with some complex shapes such as hooks. The use of moving mold forming inserts breaks down the original complex overall processing of the moving mold core, which can reduce the processing difficulty and improve the processing accuracy and efficiency.
[0015] Furthermore, the fixed mold mechanism includes a panel, a fixed template, and a fixed mold cavity. The fixed template is connected to the panel, and the fixed mold cavity is embedded in the fixed template. The fixed mold cavity is provided with a groove that matches the protruding structure.
[0016] In the above solution, the panel is used to connect to the injection molding machine. The fixed mold plate and the moving mold plate movably abut against each other, so that the fixed mold cavity can be precisely aligned with the moving mold core. The fixed mold cavity is provided with a groove that matches the raised structure. During the injection molding process, the raised structure can be accurately embedded in the groove, providing precise positioning and molding space for the product. This precise fit ensures the dimensional accuracy and shape accuracy of the product, so that the product can be molded strictly according to the design requirements, reducing the dimensional deviation and shape error of the product, and improving the quality and consistency of the product.
[0017] Furthermore, the fixed mold mechanism also includes a plurality of fixed mold forming inserts, which pass through the fixed mold cavity and movably abut against the moving mold core.
[0018] In the above solution, some special structures such as hole structures need to be formed on the TFT screen. The fixed mold insert can be precision machined separately, without having to perform complex integrated machining of the entire fixed mold cavity, thereby reducing the machining difficulty and improving the machining accuracy.
[0019] Furthermore, the surfaces on which the moving model core and the fixed model cavity are formed are both inclined surfaces, and the protruding structure is trapezoidal.
[0020] In the above scheme, the protrusion structure is trapezoidal to match the forming groove forming TFT screen bracket. The structure is simple and easy to process. The inclined surface design allows the moving mold core and the fixed mold cavity to fit better when the mold is closed. Compared with the planar fit, the inclined surface fit has a certain guiding effect during the mold closing process, which can ensure the accurate alignment of the moving mold core and the fixed mold cavity, and make the mold fit more precise.
[0021] This utility model discloses a TFT screen bracket injection mold, which has the advantages of high molding precision and shortening the flow path of plastic, thereby improving injection molding efficiency. The fixed mold mechanism and the moving mold mechanism are connected to form a complete TFT screen bracket molding space. The design of the raised structure of the moving mold core and the molding groove surrounding it can accurately shape and size the TFT screen bracket. Molten plastic enters the main runner through the nozzle and then enters the branch runner from the main runner. The branch runner is embedded in the raised structure, making the overall structure compact. The sprue on the branch runner passes through the through hole on the side of the raised structure, directly introducing the molten plastic into the molding groove. This shortens the flow path of the plastic, reduces pressure loss and temperature drop during the flow process, reduces molding defects caused by uneven plastic flow, and ensures that the plastic can fill the entire molding groove in a short time, thus improving the efficiency and quality of injection molding production. Attached Figure Description
[0022] Figure 1 This is a perspective view of an injection mold for a TFT screen bracket according to an embodiment.
[0023] Figure 2 This is a schematic diagram of the moving mold mechanism in one embodiment.
[0024] Figure 3 This is a schematic diagram of the moving model core structure of one embodiment.
[0025] Figure 4 for Figure 3 A magnified view of a portion of point A in the middle.
[0026] Figure 5 This is a schematic diagram of a gating system and ejector pin assembly according to one embodiment.
[0027] Figure 6 for Figure 5 A magnified view of a section at point B.
[0028] Figure 7 This is a schematic diagram of the core structure of the model.
[0029] The reference numerals in the attached diagrams are as follows: 100, Fixed mold mechanism; 200, Moving mold mechanism; 300, Gating system; 2, Sprue; 3, Moving mold plate; 4, Moving mold core; 41, Raised structure; 42, Molding groove; 411, Through hole; 412, Positioning hole; 5, Main runner; 6, Sub-runner; 61, Sprue; 62, Positioning pin; 7, Base plate; 8, Upper ejector plate; 9, Lower ejector plate; 10, Ejector assembly; 11, Moving mold molding insert; 12, Panel; 13, Fixed mold plate; 14, Fixed mold cavity; 15, Fixed mold molding insert. Detailed Implementation
[0030] The following will describe in further detail a TFT screen bracket injection mold of the present invention with reference to specific embodiments and accompanying drawings.
[0031] like Figures 1 to 4 As shown in a preferred embodiment, a TFT screen bracket injection mold of the present invention includes a fixed mold mechanism 100, a moving mold mechanism 200, and a gating system 300. The fixed mold mechanism 100 is movably connected to the moving mold mechanism 200. The moving mold mechanism 200 includes a moving template 3 and a moving mold core 4. The moving mold core 4 is connected to the moving template 3. The moving mold core 4 includes a protruding structure 41 and a molding groove 42 surrounding the outer periphery of the protruding structure 41. The side of the protruding structure 41 is provided with a plurality of through holes 411. The gating system 300 includes a nozzle 2, a main runner 5, and a branch runner 6. The nozzle 2 is connected to the fixed mold mechanism 100 and passes through the fixed mold mechanism 100 to abut against the moving mold core 44. The main runner 5 is connected to the nozzle 2. The branch runner 6 is connected to the main runner 5. The branch runner 6 is embedded in the protruding structure 41. The gating port 61 on the branch runner 6 passes through the through holes 411.
[0032] In the above embodiment, the fixed mold mechanism 100 and the moving mold mechanism 200 are connected to form a complete TFT screen bracket molding space. The design of the protruding structure 41 of the moving mold core 4 and the molding groove 42 surrounding it can accurately shape the shape and size of the TFT screen bracket. The molten plastic enters the main channel 5 through the nozzle 2 and then enters the branch channel 6 from the main channel 5. The branch channel 6 is embedded in the protruding structure 41, making the overall structure compact. The pouring port 61 on the branch channel 6 passes through the through hole 411 on the side of the protruding structure 41 and directly introduces the molten plastic into the molding groove 42. This shortens the flow path of the plastic, reduces the pressure loss and temperature drop of the plastic during the flow process, reduces molding defects caused by uneven plastic flow, and ensures that the plastic can fill the entire molding groove 42 in a short time, thereby improving the efficiency and quality of injection molding production.
[0033] As shown in the figure, in some embodiments, the gating gate 61 is conical, and the angle between the central axis of the gating gate 61 and the mold opening direction is greater than 0°. The gating gate 61 passes through the through hole 411 to introduce molten plastic into the molding groove 42. Since the through hole 411 is on the side of the protruding structure 41, the angle between the central axis of the gating gate 61 and the mold opening direction is greater than 0°. This gives the gating gate 61 a certain tilt angle, which, together with the conical structure, facilitates the separation of the moving mold core 4 from the gating system 300, thereby improving the demolding efficiency of the TFT screen bracket.
[0034] like Figure 1 and Figure 5 As shown, in some embodiments, the moving mold mechanism 200 further includes a base plate 7, an upper ejector plate 8, a lower ejector plate 9, and ejector assembly 10. The upper ejector plate 8 is connected to the base plate 7, the upper ejector plate 8 is connected to the lower ejector plate 9, and several sets of ejector assembly 10 are connected to the lower ejector plate 9. Since the upper ejector plate 8 is connected to the base plate 7, and the lower ejector plate 9 is connected to the upper ejector plate 8, during demolding, the ejection power of the injection molding machine can be transmitted to the upper ejector plate 8 through the base plate 7, and then evenly distributed to the lower ejector plate 9 by the upper ejector plate 8. This ultimately allows the several sets of ejector assembly 10 connected to the lower ejector plate 9 to eject synchronously and smoothly. This smooth ejection avoids problems such as deformation and cracking of the product due to uneven local stress, ensuring that the product can smoothly exit the mold cavity.
[0035] like Figure 5 and Figure 6 As shown, in some embodiments, the diversion channel 6 includes a plurality of positioning posts 62, and the protruding structure 41 is provided with a plurality of positioning holes 412. The positioning posts 62 are movably inserted through the positioning holes 412, and a set of ejector pin assemblies 10 movably abuts against the positioning posts 62. The cooperation between the positioning pin 62 and the positioning hole 412 provides a precise positioning reference for mold assembly. During mold assembly, the positioning pin 62 can be accurately inserted into the positioning hole 412, so that the relative position between the runner 6 and the raised structure 41 can be precisely fixed. This helps to ensure the positional accuracy between various parts of the mold and avoid problems such as poor plastic flow and product size deviation caused by assembly errors, thereby improving the overall assembly quality and stability of the mold. One set of ejector pin assembly 10 is in movable contact with the positioning pin 62. During demolding, the ejector pin assembly 10 can apply ejection force to the positioning pin 62, so that the positioning pin 62 can be smoothly removed from the positioning hole 412. This design avoids the adhesion between the positioning pin 62 and the raised structure 41, ensuring that the runner 6 can separate from the moving mold core 4 with the ejection action, thus improving demolding efficiency.
[0036] like Figure 6As shown, in some embodiments, the moving mold mechanism 200 further includes multiple moving mold forming inserts 11, which pass through the moving mold core 4. The TFT screen bracket needs to be molded with complex shapes such as hooks. The use of the moving mold forming inserts 11 breaks down the originally complex overall processing of the moving mold core 4, thus reducing processing difficulty and improving processing accuracy and efficiency.
[0037] like Figure 6 and Figure 7 As shown, in some embodiments, the fixed mold mechanism 100 includes a panel 12, a fixed template 13, and a fixed mold cavity 14. The fixed template 13 is connected to the panel 12, and the fixed mold cavity 14 is embedded in the fixed template 13. The fixed mold cavity 14 has a groove that matches the protruding structure 41. The panel 12 is used to connect to the injection molding machine. The fixed template 13 movably abuts against the moving template 3, so that the fixed mold cavity 14 can be precisely aligned with the moving mold core 4. The fixed mold cavity 14 has a groove that matches the protruding structure 41. During the injection molding process, the protruding structure 41 can be accurately embedded in the groove, providing precise positioning and molding space for the product. This precise fit ensures the dimensional and shape accuracy of the product, enabling the product to be molded strictly according to the design requirements, reducing the dimensional deviation and shape error of the product, and improving the quality and consistency of the product.
[0038] like Figure 6 and Figure 7 As shown, in some embodiments, the fixed mold mechanism 100 further includes a plurality of fixed mold forming inserts 15, which pass through the fixed mold cavity 14 and movably abut against the moving mold core 4. When special structures such as hole structures need to be formed on the TFT screen, the fixed mold forming inserts 15 can be individually precision machined, eliminating the need for complex integrated machining of the entire fixed mold cavity 14, thereby reducing machining difficulty and improving machining accuracy.
[0039] like Figure 7 As shown, in some embodiments, the surfaces on which the moving mold core 4 and the fixed mold cavity 14 are formed are both inclined, and the protruding structure 41 is trapezoidal. The trapezoidal shape of the protruding structure 41 is to cooperate with the forming groove 42 to form the TFT screen bracket. The structure is simple and easy to process. The inclined design allows the moving mold core 4 and the fixed mold cavity 14 to fit better when the mold is closed. Compared with the planar fit, the inclined fit has a certain guiding effect during the mold closing process, which can ensure the accurate alignment of the moving mold core 4 and the fixed mold cavity 14, and make the mold fit more precise.
[0040] The present invention relates to the working principle and process of an injection mold for a TFT screen bracket. During injection molding, the base plate 7 is driven by an external power to move the moving mold mechanism 200 toward the fixed mold mechanism 100, so that the moving mold plate 3 abuts against the fixed mold plate 13, and the moving mold core 4 abuts against the fixed mold cavity 14. Then, the molten plastic enters the main runner 5 through the nozzle 2, and then enters the sub-runner 6 from the main runner 5. The pouring port 61 on the sub-runner 6 passes through the through hole 411 on the side of the protruding structure 41, and directly introduces the molten plastic into the molding groove 42. After the TFT screen bracket is formed, the moving mold plate 3 moves away from the fixed mold plate 13. One set of ejector pin assemblies 10 pushes the sub-runner 6 to separate from the moving mold core 4, and other ejector pin assemblies 10 push the TFT screen bracket to demold.
[0041] In the description of this utility model, it should be understood that terms such as "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0042] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0043] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0044] Although the description of this utility model has been given in conjunction with the specific embodiments described above, it is obvious to those skilled in the art that many substitutions, modifications, and variations can be made based on the above description. Therefore, all such substitutions, modifications, and variations are included within the spirit and scope of the appended claims.
Claims
1. A TFT screen support injection mold, characterized in that, It includes a fixed mold mechanism, a moving mold mechanism, and a gating system, wherein the fixed mold mechanism is movably connected to the moving mold mechanism. The moving mold mechanism includes a moving template and a moving mold core. The moving mold core is connected to the moving template. The moving mold core includes a protruding structure and a forming groove surrounding the outer periphery of the protruding structure. The protruding structure is provided with several through holes. The gating system includes a nozzle, a main runner, and a branch runner. The nozzle is connected to the fixed mold mechanism and passes through the fixed mold mechanism to abut against the moving mold core. The main runner is connected to the nozzle, and the branch runner is connected to the main runner. The branch runner is embedded in the protruding structure, and the gating port on the branch runner passes through the through hole.
2. The TFT screen support injection mold of claim 1, wherein, The gating gate is conical, and the angle between the central axis of the gating gate and the mold opening direction is greater than 0°.
3. The TFT screen support injection mold of claim 1, wherein, The moving mold mechanism further includes a base plate, an upper ejector plate, a lower ejector plate, and ejector pin assemblies. The upper ejector plate is connected to the base plate, the upper ejector plate is connected to the lower ejector plate, and several sets of ejector pin assemblies are connected to the lower ejector plate.
4. The TFT screen support injection mold of claim 3, wherein, The diversion channel includes several positioning posts, and the protruding structure is provided with several positioning holes. The positioning posts are movably inserted through the positioning holes, and one set of the ejector pin assemblies movably abuts against the positioning posts.
5. The TFT screen support injection mold of claim 1, wherein, The moving mold mechanism also includes a plurality of moving mold forming inserts, which pass through the moving mold core.
6. The TFT screen support injection mold of claim 1, wherein, The fixed mold mechanism includes a panel, a fixed template, and a fixed mold cavity. The fixed template is connected to the panel, and the fixed mold cavity is embedded in the fixed template. The fixed mold cavity has a groove that matches the protruding structure.
7. The TFT screen support injection mold of claim 6, wherein, The fixed mold mechanism also includes a plurality of fixed mold forming inserts, which pass through the fixed mold cavity and movably abut against the moving mold core.
8. The TFT screen support injection mold of claim 6, wherein, The surfaces formed by the cooperation of the moving model core and the fixed model cavity are all inclined surfaces, and the protruding structure is trapezoidal.