Front mold assembly for impeller injection molding machining

Abstract

The utility model discloses a front mold assembly for impeller injection molding, and belongs to the technical field of injection molds. Comprising a fixing plate, a pressing plate, an integrated plate, a mold core, sliding block assemblies, a sleeve and a runner assembly, the pressing plate is installed on the fixing plate, the integrated plate is connected with the pressing plate and can slide relative to the pressing plate, the mold core is installed on the integrated plate, two sets of sliding block assemblies are arranged on the opposite sides of the mold core respectively, the sliding block assemblies are connected with the integrated plate in a sliding mode, and the sleeve is connected with the runner assembly. A six-blade bulge is arranged on the mold core, and a sleeve is arranged in the middle of the six-blade bulge; a set of cooling water path is arranged in each of the mold core and the pressing plate; a runner assembly is arranged on the fixed plate and penetrates through the mold core; the front mold assembly for impeller injection molding is optimally designed, so that the machining precision, efficiency and machining quality of the front mold assembly are improved.

Description

Technical Field

[0001] This utility model relates to a front mold assembly for impeller injection molding, belonging to the field of injection mold technology. Background Technology

[0002] Injection molding is a commonly used method for producing plastic products in modern industrial production. First, a corresponding injection mold is manufactured according to the product shape. Molten plastic is then injected into the mold cavity. A cooling system cools and solidifies the molten plastic to form the desired injection-molded product. The mold is then opened, and the product is removed. Injection-molded products offer high precision, meeting the diverse needs of various industries. A single injection mold can be reused multiple times, resulting in low production costs and widespread acceptance among businesses. For automotive parts manufacturers, in the context of lightweighting and cost reduction in automobiles, many parts that were originally made of metal are now made of plastic and processed into specific shapes using injection molds. Impellers are common automotive parts, therefore, injection molds for impeller production are also a widely used and important type of mold in automotive parts manufacturing companies. Due to the thin blade structure of impellers, the injection molding process is relatively complex, requiring extremely high dynamic balance values ​​and demanding high standards in the design of the injection mold.

[0003] The process of smoothly separating the cured plastic impeller from the mold is called demolding. Due to the complex structure of the impeller, the twisted shape of the blades, and the slow cooling rate, the removal of the impeller product from existing impeller molds is quite troublesome. Some injection molds use side core-pulling components to complete the demolding action. However, in order to ensure that the impeller can smoothly detach from the molding insert, the side core-pulling component must ensure that the molding insert has sufficient stroke, which makes the entire injection mold very large and the manufacturing cost high. In addition, traditional molds are not ideal in terms of molding speed, resulting in long processing times for a single injection, which not only increases time costs but also reduces the manufacturing efficiency of mold processing. With the continuous advancement of technology, higher requirements are being placed on the precision, efficiency, and quality of impeller injection molds. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, this utility model provides a front mold assembly for impeller injection molding.

[0005] The technical solution adopted in this utility model is as follows: a front mold assembly for impeller injection molding is designed to cooperate with a rear mold assembly to produce a six-bladed impeller. It includes a fixed plate, a pressure plate, an integrated plate, a mold core, a slider assembly, a sleeve, and a runner assembly. The pressure plate is mounted on the fixed plate. The integrated plate is connected to the pressure plate and can slide relative to it. The mold core is mounted on the integrated plate. Two sets of slider assemblies are respectively arranged on opposite sides of the mold core. The slider assemblies are slidably connected to the integrated plate. The mold core has six-bladed protrusions, and a sleeve is provided in the middle of each protrusion. A cooling water channel is provided inside both the mold core and the pressure plate. A runner assembly is provided on the fixed plate, and the runner assembly penetrates the mold core.

[0006] When the mold is closed, the four sets of slider assemblies, sleeves and six-bladed protrusions together form the front mold cavity. The flow channel assembly is connected to the front mold cavity. The rear mold assembly is provided with a rear mold cavity. The rear mold cavity and the front mold cavity together form the forming cavity of the six-bladed impeller.

[0007] Furthermore, pull plates are respectively provided on opposite sides of the pressure plate, and slide rails are provided on the pull plates. Pull columns are provided on the integrated plate, and the pull columns are inserted into the slide rails. The pressure plate and the integrated plate are slidably connected through the pull plates and pull columns. Two pull plates are provided on each side of the pressure plate.

[0008] Furthermore, guide posts are provided at the four corners of the fixing plate, the guide posts penetrate the pressure plate and the integrated plate, and guide holes for receiving the guide posts are provided on the rear mold assembly.

[0009] Furthermore, the integrated plate is provided with a mold groove and a slide groove. The mold core is installed in the mold groove, and the slider assembly is slidably connected to the slide groove. Steps are provided on both sides of the bottom of the slide groove, and pressure strips are fixedly provided on the steps. The pressure strips extend outward beyond the steps. The slider assembly includes a slider seat and a core-pulling slider fixed on the slider seat. A protruding ridge is provided on one opposite side of the slider seat, and the protruding ridge is engaged in the slide groove under the pressure strip.

[0010] Furthermore, the mold core is provided with a guide groove, and the core-pulling slider is engaged in the guide groove and can slide along the guide groove.

[0011] Furthermore, the slider seat is provided with an oblique guide hole, and the fixed plate is provided with an oblique guide block corresponding to the oblique guide hole. When the integrated plate slides relative to the pressure plate, the oblique guide block moves in the oblique guide hole, thereby driving the slider seat to slide.

[0012] Furthermore, the integrated plate is provided with inclined guide rods on its four sides, and a shovel base is also provided on the outer side of the integrated plate corresponding to the inclined guide rods.

[0013] Furthermore, the inlet and outlet ends of the cooling water passages within the pressure plate extend through the pressure plate, and the inlet and outlet ends of the cooling water passages within the mold core extend through the mold core and then through the integrated plate. Moreover, the inlet and outlet ends of the cooling water passages on the pressure plate and the inlet and outlet ends of the cooling water passages on the mold core are located on the same side.

[0014] Furthermore, the runner assembly includes a sprue sleeve and a runner pipe. The sprue sleeve is mounted on a fixed plate. One end of the runner pipe is located in the middle of the sprue sleeve, and the other end passes through the pressure plate, the integrated plate, and the mold core to connect with the front mold cavity. Three spot gates are provided at the end of the runner pipe that connects with the front mold cavity.

[0015] Furthermore, the fixing plate is also provided with a positioning ring and a locking module. The positioning ring is located in the middle of the fixing plate, and the locking module is located on one side of the fixing plate.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This invention utilizes a four-set core-pulling slider assembly (which automatically pulls the core during mold opening) to facilitate impeller demolding after molding. The slider assembly slides through inclined guide holes and blocks, requiring minimal movement space and thus preventing the overall mold size from becoming too large. Furthermore, the multi-channel cooling water system allows for rapid impeller molding and shaping, ensuring quality and precision, reducing the time required for each injection molding process, lowering time costs, and improving mold manufacturing efficiency. This invention optimizes the design of the front mold assembly for impeller injection molding, improving its processing accuracy, efficiency, and quality. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, 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 these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the isometric view of the front mold assembly of this utility model.

[0020] Figure 2 This is a schematic diagram of the front mold assembly of this utility model from another perspective, using an isometric view.

[0021] Figure 3 This is a schematic diagram showing the hidden part of the front mold assembly structure of this utility model.

[0022] Figure 4 for Figure 3 Another perspective illustration.

[0023] Figure 5 for Figure 4 A schematic diagram showing the hidden parts of the structure.

[0024] Figure 6 for Figure 5 A schematic diagram showing the hidden parts of the structure.

[0025] Figure 7 for Figure 6 A schematic diagram showing the hidden parts of the structure.

[0026] Figure 8 for Figure 7 Another perspective illustration.

[0027] Figure 9 for Figure 8 A schematic diagram showing the hidden parts of the structure.

[0028] Figure 10 This is a schematic diagram of the flow channel assembly of this utility model.

[0029] Figure 11 This is a schematic diagram of the integrated board of this utility model.

[0030] Figure 12 This is a schematic diagram of the isometric projection of the six-bladed impeller produced by this utility model.

[0031] Figure 13 This is an isometric view of the six-bladed impeller produced by this utility model from another perspective.

[0032] Figure 14 This is a schematic diagram of the rear mold assembly used in conjunction with this utility model.

[0033] In the diagram: 1. Fixed plate; 2. Pressure plate; 3. Integrated plate; 4. Mold core; 5. Slider assembly; 6. Sleeve; 7. Runner assembly; 8. Hexagonal protrusion; 9. Cooling water channel; 10. Front mold cavity; 11. Rear mold cavity; 12. Pull plate; 13. Slide rail; 14. Pull post; 15. Guide post; 16. Mold groove; 17. Slide groove; 18. Step; 19. Pressure strip; 20. Slider seat; 21. Core-pulling slider; 22. Guide groove; 23. Angled guide hole; 24. Angled guide block; 25. Angled guide rod; 26. Shovel base; 27. Sprue sleeve; 28. Runner pipe; 29. ​​Positioning ring; 30. Locking module; 31. Guide hole. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0035] 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0036] Example 1

[0037] like Figure 1-2 As shown, a front mold assembly for impeller injection molding is used in conjunction with a rear mold assembly (such as...). Figure 14 As shown) to produce a six-bladed impeller (such as Figure 12-13 As shown), it includes a fixed plate 1, a pressure plate 2, an integrated plate 3, a mold core 4, a slider assembly 5, a sleeve 6, and a runner assembly 7. The pressure plate 2 is mounted on the fixed plate 1. The integrated plate 3 is connected to the pressure plate 2 and can slide relative to the pressure plate 2. The mold core 4 is mounted on the integrated plate 3. Two sets of slider assemblies 5 are respectively provided on opposite sides of the mold core 4. The slider assemblies 5 are slidably connected to the integrated plate 3, thereby facilitating core pulling and demolding. The mold core 4 is provided with a six-bladed protrusion 8 (similar to a punch), which can fill the gap formed between adjacent blades of the six-bladed impeller to be produced. A sleeve 6 is provided in the middle of the six-bladed protrusion 8. A cooling water channel 9 is provided in the mold core 4 and the pressure plate 2 respectively, which can quickly cool and form the impeller. The fixed plate 1 is provided with a runner assembly 7, which penetrates the mold core 4, and injection molding is performed through the runner assembly 7. Figure 3-11 As shown.

[0038] When the front mold assembly and the rear mold assembly are closed, the four sets of slider assemblies 5, sleeves 6 and six-bladed protrusions 8 together form the front mold cavity 10. The flow channel assembly 7 is connected to the front mold cavity 10. The rear mold assembly is provided with a rear mold cavity 11. The rear mold cavity 11 and the front mold cavity 10 together form the forming cavity of the six-bladed impeller.

[0039] Example 2

[0040] This embodiment, based on embodiment 1, provides a structure in which an integrated plate 3 and a pressure plate 2 are slidably connected: a pull plate 12 is provided on one opposite side of the pressure plate 2, and a slide rail 13 (strip-shaped opening) is provided on the pull plate 12; a pull post 14 (which can be threaded onto the integrated plate 3) is provided on the integrated plate 3; the pull post 14 is inserted into the slide rail 13 and can slide within it; the pressure plate 2 and the integrated plate 3 are slidably connected through the pull plate 12 and the pull post 14; two pull plates 12 are provided on each side of the pressure plate 2, making the transmission reliable and smooth.

[0041] In this embodiment, guide posts 15 are respectively provided at the four corners of the fixed plate 1. The guide posts 15 penetrate the pressure plate 2 and the integrated plate 3, so that the integrated plate 3 can slide along the guide posts 15. The rear mold assembly is provided with guide holes 31 for receiving the guide posts 15. On the one hand, the guide posts 15 ensure that the front mold assembly and the rear mold assembly are quickly aligned and closed. On the other hand, the guide posts 15 also have a supporting effect on the sliding of the integrated plate 3 relative to the pressure plate 2, making the sliding of the integrated plate 3 more stable.

[0042] Example 3

[0043] This embodiment is a further optimization and refinement of the front mold assembly based on Embodiment 2:

[0044] The front mold assembly for impeller injection molding described in this embodiment has a mold groove 16 and a slide groove 17 on its integrated plate 3. The mold core 4 is installed in the mold groove 16 for quick installation. The slider assembly 5 is slidably connected to the slide groove 17. Specifically, steps 18 are provided on both sides of the bottom of the slide groove 17, and pressure strips 19 are fixedly provided on the steps 18. The pressure strips 19 extend outward beyond the steps 18 to form a groove. The slider assembly 5 includes a slider seat 20 and a core-pulling slider 21 fixed on the slider seat 20. A protruding ridge is provided on one opposite side of the slider seat 20. The protruding ridge is engaged in the slide groove 17 under the pressure strip 19 to form a sliding connection. It can be understood that the slider seat 20 can also be other sliding connection methods.

[0045] In this embodiment, the mold core 4 is provided with a guide groove 22, and the core-pulling slider 21 is stuck in the guide groove 22 and can slide along the guide groove 22, so that the stroke of the core-pulling slider 21 is more accurate and the impeller forming quality is guaranteed.

[0046] Example 4

[0047] This embodiment is based on embodiment 3, and provides a way to drive the slider assembly 5 to slide:

[0048] The slider seat 20 is provided with an oblique guide hole 23, and the fixed plate 1 is provided with an oblique guide block 24 corresponding to the oblique guide hole 23. When the integrated plate 3 slides relative to the pressure plate 2, the oblique guide block 24 moves in the oblique guide hole 23, thereby driving the slider seat 20 to slide. The sliding stroke is small, which makes the volume of the mold too large.

[0049] In this embodiment, inclined guide rods 25 are respectively provided on the four sides of the integrated plate 3, and a shovel base 26 is also provided on the outer side of the integrated plate 3 corresponding to the inclined guide rods 25. It is mainly used to drive the core pulling structure on the rear mold assembly, reduce the structural arrangement pressure of the rear mold assembly, and make the arrangement reasonable.

[0050] Example 5

[0051] This embodiment is an optimization and refinement of the cooling water circuit 9 based on embodiment 4:

[0052] The inlet and outlet ends of the cooling water passage 9 in the pressure plate 2 extend out of the pressure plate 2. After the inlet and outlet ends of the cooling water passage 9 in the mold core 4 extend out of the mold core 4, they pass through the integrated plate 3. The inlet and outlet ends of the cooling water passage 9 on the pressure plate 2 and the inlet and outlet ends of the cooling water passage 9 on the mold core 4 are located on the same side, which facilitates connection and operation.

[0053] Example 6

[0054] This embodiment is a further optimization and refinement of the structure of the flow channel component 7 based on embodiment 5:

[0055] The runner assembly 7 includes a sprue sleeve 27 and a runner pipe 28. The sprue sleeve 27 is mounted on the fixed plate 1. One end of the runner pipe 28 is located in the middle of the sprue sleeve 27, and the other end passes through the pressure plate 2, the integrated plate 3, and the mold core 4 and connects to the front mold cavity 10. The runner pipe 28 is connected to the front mold cavity 10 and has three point injection pipes, which allow for simultaneous injection molding at three points, facilitating the uniform molding of the impeller.

[0056] In this embodiment, the fixing plate 1 is also provided with a positioning ring 29 and a locking module 30. The positioning ring 29 is located in the middle of the fixing plate 1 to facilitate docking with the injection molding feeding structure. The locking module 30 is located on one side of the fixing plate 1. When the front mold assembly and the rear mold assembly are closed, one end of the locking module 30 is fixed to the front mold assembly, and the other end is fixed to the rear mold assembly (a detachable fixing structure connected by bolts) to facilitate mold locking during injection molding and prevent relative displacement.

[0057] When using this application, it is used in conjunction with the rear mold assembly to complete the injection molding of the impeller through mold closing, injection molding, cooling, mold opening, and demolding. During mold opening, the fixed plate 1 first drives the pressure plate 2 to move, the pressure plate 2 separates from the integrated plate 3, the inclined guide block 24 drives the slider assembly 5 to pull the core, after the inclined guide block 24 exits the inclined guide hole 23, the fixed plate 1 continues to move, and the pull plate 12 on the pressure plate 2 pulls the integrated plate 3 to move until the mold opening is completed.

[0058] Furthermore, in the description of this utility model, unless otherwise stated, the terms "multiple," "multiple roots," and "multiple groups" mean two or more, and "several," "several roots," and "several groups" mean one or more. In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used 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. Furthermore, the terms "first," "second," and "third" are used only for descriptive purposes and should not be construed as indicating or implying relative importance.

[0059] The specific embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A front mold assembly for impeller injection molding processing, characterized by: The utility model provides a six-leaf impeller production cooperation with rear mould assembly, it includes fixed plate, pressing plate, integrated board, mould core, slider assembly, sleeve and runner assembly, the fixed plate installs the pressing plate, the integrated board is connected with pressing plate and can slide relative to pressing plate, the integrated board installs mould core, one opposite side of mould core is provided with two groups of slider assembly respectively, slider assembly is connected with integrated board slidingly, six-leaf convex is provided on the mould core, and the sleeve is provided in the middle part of six-leaf convex;Mould core and pressing plate are provided with a set of cooling waterway respectively;Runner assembly is set up on the fixed plate, and runner assembly penetrates mould core; When the mould is closed, four groups of slider assembly, sleeve and six-leaf convex jointly enclose the front mould cavity, the runner assembly is communicated with the front mould cavity, the rear mould cavity is set up on the rear mould assembly, and the rear mould cavity and the front mould cavity jointly enclose the forming cavity of six-leaf impeller.

2. The preform assembly for impeller injection molding processing according to claim 1, characterized in that: One opposite side of the pressing plate is provided with pull plate respectively, the pull plate is provided with slide way, the integrated board is provided with pull column, the pull column is inserted in the slide way, the pressing plate and integrated board realize sliding connection through pull plate and pull column, and each side of the pressing plate is provided with two pull plates respectively.

3. The preform assembly for impeller injection molding processing according to claim 2, characterized in that: The four corners of the fixed plate are provided with guide columns respectively, the guide columns penetrate the pressing plate and integrated board, and the rear mould assembly is provided with guide holes for receiving the guide columns.

4. The preform assembly for impeller injection molding processing according to claim 3, wherein: The integrated board is provided with mould groove and sliding groove, the mould core is installed in the mould groove, and the slider assembly is slidingly connected with the sliding groove;The bottom of the sliding groove is provided with steps on both sides respectively, the pressing strip is fixedly arranged on the step, the pressing strip exceeds the step outward, the slider assembly includes slider seat and core-pulling slider fixed on the slider seat, one opposite side of the slider seat is provided with convex rib respectively, and the convex rib is clamped in the sliding groove under the pressing strip.

5. The preform assembly for impeller injection molding processing according to claim 4, wherein: The mould core is provided with guide groove, and the core-pulling slider is clamped in the guide groove and can slide along the guide groove.

6. The preform assembly for impeller injection molding processing according to claim 5, wherein: The slider seat is provided with inclined guide hole, the fixed plate is provided with inclined guide block corresponding to the inclined guide hole, and when the integrated board slides relative to the pressing plate, the inclined guide block moves in the inclined guide hole, thereby driving the slider seat to slide.

7. The preform assembly for impeller injection molding processing according to claim 6, wherein: The four sides of the integrated board are provided with inclined guide rods, and the outer side of the integrated board corresponding to the inclined guide rods is further provided with shovel base.

8. The preform assembly for impeller injection molding processing according to claim 7, wherein: The inlet and outlet ends of the cooling waterway in the pressing plate penetrate the pressing plate, the inlet and outlet ends of the cooling waterway in the mould core penetrate the mould core, penetrate the integrated board again, and the inlet and outlet ends of the cooling waterway on the pressing plate and the inlet and outlet ends of the cooling waterway on the mould core are located on the same side.

9. A preform assembly for impeller injection molding processing according to any one of claims 1-8, characterized in that: The runner assembly includes sprue bush and runner pipeline, the sprue bush is arranged on the fixed plate, one end of the runner pipeline is arranged in the middle part of the sprue bush, the other end penetrates the pressing plate, the integrated board and the mould core, and is communicated with the front mould cavity, and the end of the runner pipeline communicated with the front mould cavity is provided with three point pouring pipes.

10. The preform assembly for impeller injection molding processing according to claim 9, wherein: The fixed plate is further provided with positioning ring and mould locking module, the positioning ring is arranged in the middle part of the fixed plate, and the mould locking module is arranged on one side of the fixed plate.

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