Impeller injection mold and injection processing method thereof

Abstract

The invention discloses an impeller injection mold and an injection molding machining method thereof, and belongs to the technical field of injection molds. Comprising a front mold body and a rear mold body, a six-blade impeller cavity is defined between the front mold body and the rear mold body, the front mold body comprises a runner assembly, the rear mold body comprises an ejection assembly, the runner assembly is communicated with the six-blade impeller cavity, and the ejection assembly is used for ejecting a formed six-blade impeller; the front mold further comprises a front mold core, a sleeve and two first sliding block assemblies, the sleeve is arranged in the middle of the front mold core, and the two first sliding block assemblies are arranged on the opposite sides of the front mold core correspondingly; the rear mold further comprises an impeller matching part, second sliding block assemblies and third sliding block assemblies, the opposite sides of the front end of the impeller matching part are each provided with one second sliding block assembly, and the other opposite sides of the front end of the impeller matching part are each provided with one third sliding block assembly. The impeller injection mold is convenient to use and can assist in rapid forming of injection molding parts, and the precision, efficiency and quality of the impeller injection mold are remarkably improved.

Description

Technical Field

[0001] The invention relates to an injection mold and an injection molding method thereof, in particular to an impeller injection mold and an injection molding method thereof, and belongs to the technical field of injection molds. Background Art

[0002] Injection molding is a commonly used method for producing plastic products in current industrial production. First, the corresponding injection mold is processed according to the shape of the product, and the heated molten plastic melt is injected into the mold cavity. The plastic melt is cooled and solidified by the cooling system to obtain the corresponding injection molded product. The mold is opened and the product is taken out. The injection molded product has high precision and can meet the different needs of various industries. A set of injection molds can be used repeatedly, and the production cost is low, which has been generally recognized by enterprises. For automobile parts processing enterprises, in the environment of lightweight and low-cost automobiles, many parts originally made of metal are made of plastic and processed into a certain shape using injection molds. Impellers are commonly used auto parts, so injection molds for impeller production are also an important type of mold commonly used in auto parts processing enterprises. Because the impeller has a thinner blade structure, its injection molding process is also relatively complicated, and the requirements for the dynamic balance value of the product are extremely high, and the requirements for the injection mold design process are also high.

[0003] The operation of smoothly separating the solidified plastic impeller from the mold is called demoulding. Due to the complex structure of the impeller, the distorted blade shape, and the slow cooling speed, the impeller mold in the prior art is more troublesome when removing the impeller product. Sometimes manual demoulding is used to complete the last step of the injection molding operation. The operator needs to use hand tools such as screwdrivers and flat-nosed pliers to remove the plastic part from the mold. However, the technical requirements for the operator are high, the demoulding efficiency is low, and the labor intensity is high. Some injection molds also use side core pulling components to complete the demoulding action. However, in order to ensure that the impeller can be smoothly separated 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 preparation cost is high. Moreover, the impeller after the side core pulling is still close to the surface of the base. Because the outer wall is relatively weak and there is no good material collection point, it still causes difficulties in material collection, and the efficiency of injection molding cannot be improved.

[0004] In addition, the traditional molds are not ideal in terms of molding speed, which leads to a long time for a single injection molding process, which not only increases the time cost, but also reduces the manufacturing efficiency of mold processing. With the continuous advancement of technology, higher requirements are placed on the precision, efficiency and quality of impeller injection molds.

[0005] Based on this, the present application proposes a six-blade impeller (such as Figure 16-17 Injection mold (shown). Summary of the invention

[0006] (I) Technical problem to be solved: The technical problem to be solved by the present invention is to solve the problems that the existing six-blade impeller injection mold is inconvenient to demould, the molding speed is slow, and the injection molding accuracy and efficiency need to be improved.

[0007] (II) Technical solution: In order to solve the above technical problems, the present invention provides an injection mold for producing a six-blade impeller, which includes a front mold and a rear mold. When the front mold and the rear mold are closed, a six-blade impeller cavity is formed between the two. The front mold includes a flow channel assembly, and the rear mold includes an ejector assembly. The flow channel assembly is connected to the six-blade impeller cavity, and the ejector assembly is used to eject the six-blade impeller after molding. The front mold also includes a front core, a sleeve and a first slider assembly. The front core is arranged at the rear end of the flow channel assembly, the sleeve is arranged in the middle of the front core, and two groups of first slider assemblies are respectively arranged on one opposite side of the front core. The rear mold also includes an impeller assembly, a second slider assembly and a third slider assembly. The impeller assembly is arranged at the front end of the ejector assembly, and one group of second slider assemblies are respectively arranged on one opposite side of the front end of the impeller assembly, and one group of third slider assemblies are respectively arranged on the other opposite side. The front core, sleeve, first slider assembly, impeller matching part, second slider assembly and third slider assembly together form a six-blade impeller cavity; the first slider assembly, impeller matching part, second slider assembly and third slider assembly are respectively slidably arranged.

[0008] Furthermore, the front mold also includes a front fixed plate, a pressure plate and a front integrated plate arranged in sequence from front to back, the front integrated plate is slidably connected to the pressure plate, the front core is fixed to the front integrated plate, the first slider assembly is slidably connected to the front integrated plate, and the runner assembly is installed on the front fixed plate and passes through the pressure plate and the front integrated plate.

[0009] Furthermore, a pull plate is provided on the pressure plate, a slide is provided on the pull plate, a pull column is provided on the front integrated plate, the pull column is inserted into the slide, the front integrated plate and the pressure plate are slidably connected through the connection between the pull plate and the pull column, and pull plates are respectively provided on opposite sides of the pressure plate, and two pull plates are provided on each side.

[0010] Furthermore, the rear mold also includes a rear fixed plate, a side plate, a rear integrated plate and a rear core. The rear fixed plate is connected to the rear integrated plate by two side plates arranged opposite to each other. The ejector assembly is slidably arranged between the two side plates. The rear core is fixed on the rear integrated plate. The impeller accessory is slidably installed in the middle of the rear core. The second slider assembly and the third slider assembly are respectively slidably connected to the rear integrated plate. The front end of the ejector assembly passes through the rear integrated plate and the rear core and abuts against the rear end of the impeller accessory.

[0011] Further, the ejection assembly includes an ejection base plate, an ejection panel, a support column, a limit column, a guide column, a return spring and an ejector pin, the ejection base plate and the ejection panel are fixedly connected and clamped between the two side plates, one end of the support column is against the rear integrated plate, and the other end passes through the ejection base plate and the ejection panel, a plurality of support columns are arranged on the ejection base plate and the ejection panel, a limit column is arranged at an oblique corner of the ejection panel, the limit column is lower than the support column, guide columns are arranged at the four corners of the ejection panel, the guide column passes through the rear integrated plate, a return spring is arranged on the guide column between the ejection panel and the rear integrated plate, an ejector pin is arranged on the ejection panel, the ejector pin passes through the rear integrated plate and the rear core and against the rear end of the impeller matching part, and an ejection hole is arranged in the middle of the rear fixed plate.

[0012] Furthermore, the first slider assembly includes a first slider seat and a first core-pulling slider fixedly connected thereto, the second slider assembly includes a second slider seat and a second core-pulling slider fixedly connected thereto, and the third slider assembly includes a third slider seat and a third core-pulling slider fixedly connected thereto.

[0013] Further, a first oblique guide hole is provided on the first slider seat, and a second oblique guide hole is provided on the second slider seat and the third slider seat respectively, an oblique guide block corresponding to the first oblique guide hole is installed on the front fixed plate, and the oblique guide block drives the first slider assembly to slide when moving in and out of the first oblique guide hole, and an oblique guide rod corresponding to the second oblique guide hole is installed on the front integrated plate, and the oblique guide rod drives the second slider assembly or the third slider assembly to slide when moving in and out of the second oblique guide hole.

[0014] Furthermore, the front mold also includes a first cooling water channel and a second cooling water channel. The first cooling water channel is arranged in the pressure plate, and its water inlet and water outlet respectively pass through the pressure plate. The second cooling water channel is arranged in the front core, and its water inlet and water outlet both pass through the front core and then pass through the front integrated plate.

[0015] Furthermore, the rear mold also includes a third cooling water channel, which is arranged in the rear core, and its water inlet and outlet both pass through the rear core and then pass through the rear integrated plate.

[0016] The present invention also provides an impeller injection molding method, which uses the impeller injection mold described above for injection molding, and the injection molding process (or method) includes mold closing, injection molding, cooling and shaping, mold opening and demoulding.

[0017] (III) Beneficial effects: The above technical solution of the present invention has the following advantages: The present invention can realize rapid demoulding and taking out of the formed impeller through the cooperation of the side core pulling assembly (the first slider assembly, the second slider assembly and the third slider assembly) and the ejection assembly with the impeller matching parts, with a high degree of automation and intelligence; and the molding speed of the formed impeller is greatly improved through the arrangement of three cooling water channels.

[0018] This application effectively improves the intelligence and automation level of the impeller injection mold by optimizing the mold design, realizes automated control and intelligent management of the injection molding process, improves production efficiency and impeller quality, and copes with the market's increasing requirements for impeller performance, making the impeller injection mold more precise and efficient. This application can improve the dimensional accuracy and shape accuracy of the impeller, and reduce production costs and cycles. The mold design of this application is reasonable, the injection molded parts cool quickly, and the demolding mechanism is flexible and reliable, to ensure that the impeller is completely removed without being damaged, while improving production efficiency and product qualification rate. The invention is easy to use, can assist in the rapid molding of injection molded parts, and significantly improves the precision, efficiency and quality of the impeller injection mold.

[0019] In addition to the technical problems solved by the present invention, the technical features of the technical solutions constituted by the present invention, and the advantages brought about by the technical features of these technical solutions described above, other technical features of the present invention and the advantages brought about by these technical features will be further explained in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of the axonometric view of the mold of the present invention.

[0022] Figure 2 It is a schematic cross-sectional view of the mold of the present invention.

[0023] Figure 3 It is a schematic diagram of the axonometric view of the front mold of the present invention.

[0024] Figure 4 for Figure 3 Schematic diagram after hiding part of the structure.

[0025] Figure 5 for Figure 4 Schematic diagram of the axonometric drawing from another perspective.

[0026] Figure 6 for Figure 5 Schematic diagram after hiding part of the structure.

[0027] Figure 7 for Figure 6 Schematic diagram after hiding part of the structure.

[0028] Figure 8 for Figure 7 Schematic diagram after hiding part of the structure.

[0029] Fig. 9 for Figure 8 Schematic diagram of the axonometric drawing from another perspective.

[0030] Fig.10 for Fig. 9 Schematic diagram after hiding part of the structure.

[0031] Fig.11 It is a schematic diagram of the axonometric view of the rear mold of the present invention.

[0032] Fig.12 It is a schematic diagram of the rear mold after hiding part of the structure of the present invention.

[0033] Fig.13 for Fig.12 Axonometric view from another perspective, with part of the structure hidden.

[0034] Fig.14 for Fig.13 Schematic diagram after hiding part of the structure.

[0035] Fig.15 for Fig.14 Schematic diagram after hiding part of the structure.

[0036] Fig.16 It is a schematic diagram of an axonometric view of a six-blade impeller produced by the mold of the present invention.

[0037] Fig.17 It is a schematic diagram of an axonometric view from another perspective of a six-blade impeller produced by the mold of the present invention.

[0038] In the figure: 1, front mold; 2, rear mold; 3, six-blade impeller cavity; 4, flow channel assembly; 5, ejector assembly; 6, front core; 7, sleeve; 8, first slider assembly; 9, impeller matching parts; 10, second slider assembly; 11, third slider assembly; 12, front fixed plate; 13, pressure plate; 14, front integrated plate; 15, pull plate; 16, slideway; 17, pull column; 18, rear fixed plate; 19, side plate; 20, rear integrated plate; 21, rear core; 22, ejector bottom plate; 23, ejector panel ; 24. Support column; 25. Limit column; 26. Guide column; 27. Return spring; 28. Ejector pin; 29. ​​Ejector hole; 30. First slider seat; 31. First core-pulling slider; 32. Second slider seat; 33. Second core-pulling slider; 34. Third slider seat; 35. Third core-pulling slider; 36. First oblique guide hole; 37. Second oblique guide hole; 38. Oblique guide block; 39. Oblique guide rod; 40. First cooling water circuit; 41. Second cooling water circuit; 42. Third cooling water circuit; 43. Positioning rod. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] Example 1: Figure 1-2 As shown, an impeller injection mold is mainly used to produce six-blade impellers (such as Figure 16-17As shown in the figure, its structure includes a front mold 1 and a rear mold 2. When the front mold 1 and the rear mold 2 are molded together, a six-blade impeller cavity 3 (impeller molding cavity) is formed between the two. The front mold 1 includes a flow channel component 4, and the rear mold 2 includes an ejector component 5. The flow channel component 4 is connected to the six-blade impeller cavity 3. During injection molding, the molding raw material is injected into the six-blade impeller cavity 3 through the flow channel component 4. After the raw material is molded and cooled in the six-blade impeller cavity 3, the mold is opened and the molded six-blade impeller is ejected through the ejector component 5. The automation level is high, and the production and processing are simple and efficient.

[0042] In this embodiment, Figure 3-10 As shown, the front mold 1 also includes a front core 6 (convex core), a sleeve 7 and a first slider assembly 8. The front core 6 is arranged at the rear end of the runner assembly 4. Specifically, the rear end of the runner assembly 4 passes through the front core 6 to communicate with the six-blade impeller cavity 3. The sleeve 7 is arranged in the middle of the front core 6. Two sets of first slider assemblies 8 are respectively arranged on opposite sides of the front core 6. Figure 11-15 As shown, the rear mold 2 also includes an impeller assembly 9, a second slider assembly 10 and a third slider assembly 11. The impeller assembly 9 (mainly simulating the pump shaft structure matched with the impeller when in use) is arranged at the front end of the ejector assembly 5. One opposite side of the front end of the impeller assembly 9 is respectively provided with a group of second slider assemblies 10, and the other opposite side is respectively provided with a group of third slider assemblies 11. The connection line of the two groups of second slider assemblies 10 and the connection line of the two groups of third slider assemblies 11 form a cross structure. The two groups of first slider assemblies 8 respectively provided on the opposite side of the front core 6 are respectively located on both sides of the connection line of the two groups of second slider assemblies 10. The two groups of second slider assemblies 10 and the four groups of first slider assemblies 8 are arranged in a circumferential array.

[0043] The front core 6, sleeve 7, first slider assembly 8, impeller matching part 9, second slider assembly 10 and third slider assembly 11 together form a six-blade impeller cavity 3; the six-blade impeller to be produced includes a wheel disc and six blades arranged on the wheel disc, the third slider assembly 11 is provided with a semicircular groove, the inner ends of the second slider assembly 10 and the first slider assembly 8 are respectively arranged as arc ends, and a protrusion that can fill the gap between adjacent blades on the six-blade impeller is provided in the middle of the front core 6. It can be simply understood that: two groups of semicircular grooves on the third slider assembly 11 form an impeller wheel disc injection cavity, and the arc ends of two groups of second slider assemblies 10 and four groups of first slider assemblies 8 respectively form an injection cavity for the six blades of the impeller with the protrusion in the middle of the front core 6.

[0044] The first slider assembly 8, the impeller matching part 9, the second slider assembly 10 and the third slider assembly 11 are respectively slidably arranged, and the core is pulled out by sliding the first slider assembly 8, the second slider assembly 10 and the third slider assembly 11, and the impeller matching part 9 is slid to eject the formed impeller.

[0045] Embodiment 2: This embodiment is based on embodiment 1 and further optimizes and refines the front mold 1.

[0046] The front mold 1 also includes a front fixed plate 12, a pressure plate 13 and a front integrated plate 14 which are arranged in sequence from front to back, the front integrated plate 14 is slidably connected to the pressure plate 13, the front core 6 is fixed on the front integrated plate 14, the first slider assembly 8 is slidably connected to the front integrated plate 14, the runner assembly 4 is installed on the front fixed plate 12 and passes through the pressure plate 13 and the front integrated plate 14, an injection port is arranged on the front fixed plate 12, and the runner assembly 4 is connected to the injection port.

[0047] In this embodiment, a rectangular pull plate 15 is provided on the pressure plate 13, and a slide 16 (waist-shaped hole) is provided on the pull plate 15. A pull column 17 (which can be threadedly connected to the front integrated plate 14) is provided on the front integrated plate 14. The pull column 17 is inserted into the slide 16 and can slide in the slide 16. The front integrated plate 14 and the pressure plate 13 are slidably connected through the connection between the pull plate 15 and the pull column 17. The connection is simple and reliable. Pull plates 15 are respectively provided on opposite sides of the pressure plate 13, and two pull plates 15 are provided on each side. The sliding structure is stable. In order to strengthen the structural strength of the connection between the front fixing plate 12, the pressing plate 13 and the front integrated plate 14, positioning rods 43 are respectively provided at the four corners of the front fixing plate 12. The positioning rods 43 penetrate the pressing plate 13 and the front integrated plate 14 and extend beyond the front integrated plate 14. Corresponding positioning holes are provided on the rear mold 2. When the front mold 1 and the rear mold 2 are closed, the positioning rods 43 are inserted into the corresponding positioning holes to make the closing more accurate.

[0048] Embodiment 3: This embodiment is based on Embodiment 2 and further optimizes and refines the rear mold 2.

[0049] The rear mold 2 also includes a rear fixed plate 18, a side plate 19, a rear integrated plate 20 and a rear core 21. The rear fixed plate 18 is connected to the rear integrated plate 20 by two side plates 19 arranged opposite to each other. A gap is left between the two side plates 19. The ejection assembly 5 is slidably arranged between the two side plates 19. The rear core 21 is fixed on the rear integrated plate 20. The impeller assembly 9 is slidably installed in the middle of the rear core 21. The second slider assembly 10 and the third slider assembly 11 are slidably connected to the rear integrated plate 20 respectively. The front end of the ejection assembly 5 passes through the rear integrated plate 20 and the rear core 21 and abuts against the rear end of the impeller assembly 9, and the impeller assembly 9 is ejected to eject the formed impeller.

[0050] In this embodiment, the ejection assembly 5 includes an ejection base plate 22, an ejection panel 23, a support column 24, a limit column 25, a guide column 26, a return spring 27 and an ejector pin 28. The ejection base plate 22 and the ejection panel 23 are fixedly connected and stuck in the gap between the two side plates 19. One end of the support column 24 is against the rear integrated board 20, and the other end passes through the ejection base plate 22 and the ejection panel 23. When the ejection assembly 5 is working, the ejection base plate 22 and the ejection panel 23 slide along the support column 24. A plurality of support columns 24 are arranged on the ejection base plate 22 and the ejection panel 23. A limit column 25 is respectively arranged at a diagonal corner of the ejection panel 23. The height of the limit column 25 is lower than the support column 24 to prevent the ejection base plate 22 and the ejection panel 23 from being over-ejected. Guide columns 26 are respectively arranged at the four corners of the ejection panel 23, and the guide columns 26 penetrate the rear integrated plate 20. Reset springs 27 are arranged on the guide columns 26 between the ejection panel 23 and the rear integrated plate 20 to facilitate the reset of the ejection bottom plate 22 and the ejection panel 23. A plurality of ejector pins 28 (arranged in a rectangular shape to facilitate the smooth ejection of the impeller assembly 9 or the impeller) are arranged on the ejection panel 23. The ejector pins 28 penetrate the rear integrated plate 20 and the rear core 21 and abut against the rear end of the impeller assembly 9. An ejection hole 29 is arranged in the middle of the rear fixed plate 18 to control the operation of the ejection assembly 5.

[0051] Embodiment 4: This embodiment is based on embodiment 3, and further optimizes and refines the mold.

[0052] The impeller injection mold described in this embodiment, its first slider assembly 8 includes a first slider seat 30 and a first core-pulling slider 31 fixedly connected thereto, the first slider seat 30 is slidably connected to the front integrated plate 14, the first core-pulling slider 31 slides along the front core 6 (the front core 6 is provided with a slide groove for receiving the first core-pulling slider 31), the second slider assembly 10 includes a second slider seat 32 and a second core-pulling slider 33 fixedly connected thereto, the third slider assembly 11 includes a third slider seat 34 and a third core-pulling slider 35 fixedly connected thereto, the second slider seat 32 and the third slider seat 34 are respectively slidably connected to the rear integrated plate 20, the second core-pulling slider 33 and the third core-pulling slider 35 respectively slide along the rear core 21 (the rear core 21 is provided with slide grooves for receiving the second core-pulling slider 33 and the third core-pulling slider 35 respectively).

[0053] In this embodiment, the first slider seat 30 is provided with a first oblique guide hole 36, the second slider seat 32 and the third slider seat 34 are respectively provided with a second oblique guide hole 37, the front fixed plate 12 is provided with an oblique guide block 38 corresponding to the first oblique guide hole 36, and the oblique guide block 38 drives the first slider assembly 8 to slide when entering and exiting the first oblique guide hole 36, and the front integrated plate 14 is provided with an oblique guide rod 39 corresponding to the second oblique guide hole 37, and the oblique guide rod 39 drives the second slider assembly 10 or the third slider assembly 11 to slide when entering and exiting the second oblique guide hole 37. It is not difficult to see that when the mold is opened, the oblique guide block 38 first drives the first slider assembly 8 to exit the impeller molding cavity, and then the oblique guide rod 39 drives the second slider assembly 10 and the third slider assembly 11 to exit the impeller molding cavity.

[0054] Embodiment 5: This embodiment is based on embodiment 4, and further optimizes and refines the mold.

[0055] The impeller injection mold described in this embodiment, its front mold 1 also includes a first cooling water channel 40 and a second cooling water channel 41, the first cooling water channel 40 is arranged in the pressure plate 13, and its water inlet end and water outlet end respectively pass through the pressure plate 13, the second cooling water channel 41 is arranged in the front core 6, and its water inlet end and water outlet end respectively pass through the front core 6 and then pass through the front integrated plate 14. The rear mold 2 also includes a third cooling water channel 42, the third cooling water channel 42 is arranged in the rear core 21, and its water inlet end and water outlet end respectively pass through the rear core 21 and then pass through the rear integrated plate 20. By setting the first cooling water channel 40, the second cooling water channel 41 and the third cooling water channel 42, the molded impeller can be quickly cooled to improve production efficiency.

[0056] Embodiment 6: This embodiment provides an impeller injection molding method, which uses the impeller injection mold described in the previous embodiment for injection molding, and the injection molding process includes mold closing, injection molding, cooling and shaping, mold opening and demoulding. Specifically: During injection molding, the front mold 1 and the rear mold 2 are first buckled together, which is mold closing; then the molding material is injected into the six-blade impeller molding cavity of the mold through the runner assembly 4, which is injection molding. After the injection molding is completed, the molded impeller is quickly, comprehensively and evenly cooled and shaped through the first cooling water channel 40, the second cooling water channel 41 and the third cooling water channel 42; then the mold is opened. When the mold is opened, the front fixed plate 12 first drives the inclined guide block 38 to drive the first slider assembly 8 to exit the impeller molding cavity, and then the front integrated plate 14 is pulled to continue moving through the pull plate 15. The front integrated plate 14 drives the inclined guide rod 39 to drive the second slider assembly 10 and the third slider assembly 11 to exit the impeller molding cavity; finally, demolding is performed, and the telescopic rod (not shown in the accompanying drawings) of the injection mold installation machine tool pushes the ejection assembly 5 to work through the ejection hole 29 on the rear fixed plate 18, and the ejector pin 28 of the ejection assembly 5 pushes the impeller matching part 9, thereby ejecting the molded impeller.

[0057] It is understandable that the present application can also be used to produce impellers with other numbers of blades, such as five-blade impellers, seven-blade impellers, and eight-blade impellers, by changing the number of the first sliding components and the second sliding components, as well as the convex shape of the front core 6.

[0058] In addition to automobiles, impellers are also widely used in water pumps, fans, household appliances, and medical fields, with the advantages of light weight, low cost, and easy processing. This application effectively improves the intelligence and automation level of the impeller injection mold by optimizing the mold design, realizes the automatic control and intelligent management of the injection molding process, improves production efficiency and impeller quality, and responds to the market's increasing requirements for impeller performance, making the impeller injection mold more precise and efficient. This application can improve the dimensional accuracy and shape accuracy of the impeller and reduce production costs and cycles.

[0059] The mold design of the application is reasonable, the cooling speed of the injection molded parts is fast, and the demoulding mechanism is flexible and reliable, so as to ensure that the impeller can be completely removed without being damaged, while improving the production efficiency and product qualification rate.

[0060] In addition, in the description of the invention, unless otherwise specified, the terms "multiple", "multiple roots", "multiple groups" are used to mean two or more than two, and "several", "several roots", "several groups" are used to mean one or more than one. In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are used only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0061] The specific implementation modes of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above implementation modes, and various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention.

Claims

1. An impeller injection mold, characterized in that: Used for producing a six-blade impeller, comprising a front mold (1) and a rear mold (2); when the front mold (1) and the rear mold (2) are closed, a six-blade impeller cavity (3) is formed between the two; the front mold (1) comprises a flow channel assembly (4); the rear mold (2) comprises an ejection assembly (5); the flow channel assembly (4) is connected to the six-blade impeller cavity (3); and the ejection assembly (5) is used to eject the six-blade impeller after molding; The front mold (1) further comprises a front core (6), a sleeve (7) and a first slider assembly (8); the front core (6) is arranged at the rear end of the runner assembly (4); the sleeve (7) is arranged in the middle of the front core (6); and two sets of first slider assemblies (8) are respectively arranged on opposite sides of the front core (6); The rear mold (2) further comprises an impeller assembly (9), a second slider assembly (10) and a third slider assembly (11); the impeller assembly (9) is arranged at the front end of the ejection assembly (5); one set of second slider assemblies (10) are respectively arranged on one opposite side of the front end of the impeller assembly (9), and one set of third slider assemblies (11) are respectively arranged on the other opposite side; The front core (6), the sleeve (7), the first slider assembly (8), the impeller matching part (9), the second slider assembly (10) and the third slider assembly (11) together form a six-blade impeller cavity (3); the first slider assembly (8), the impeller matching part (9), the second slider assembly (10) and the third slider assembly (11) are respectively slidably arranged.

2. The impeller injection mold according to claim 1, characterized in that: The front mold (1) further comprises a front fixing plate (12), a pressing plate (13) and a front integrated plate (14) which are arranged in sequence from front to back, the front integrated plate (14) being slidably connected to the pressing plate (13), the front mold core (6) being fixed on the front integrated plate (14), the first slider assembly (8) being slidably connected to the front integrated plate (14), and the runner assembly (4) being mounted on the front fixing plate (12) and passing through the pressing plate (13) and the front integrated plate (14).

3. The impeller injection mold according to claim 2, characterized in that: The pressing plate (13) is provided with a pulling plate (15), and a slideway (16) is provided on the pulling plate (15). The front integrated plate (14) is provided with a pulling column (17), and the pulling column (17) is inserted into the slideway (16). The front integrated plate (14) and the pressing plate (13) are slidably connected through the connection between the pulling plate (15) and the pulling column (17). Pulling plates (15) are respectively provided on opposite sides of the pressing plate (13), and two pulling plates (15) are provided on each side.

4. The impeller injection mold according to claim 3, characterized in that: The rear mold (2) further comprises a rear fixing plate (18), a side plate (19), a rear integrated plate (20) and a rear core (21); the rear fixing plate (18) and the rear integrated plate (20) are connected via two side plates (19) arranged opposite to each other; the ejector assembly (5) is slidably arranged between the two side plates (19); the rear core (21) is fixed on the rear integrated plate (20); the impeller assembly (9) is slidably mounted on the middle part of the rear core (21); the second slider assembly (10) and the third slider assembly (11) are slidably connected to the rear integrated plate (20) respectively; the front end of the ejector assembly (5) passes through the rear integrated plate (20) and the rear core (21) and abuts against the rear end of the impeller assembly (9).

5. The impeller injection mold according to claim 4, characterized in that: The ejection assembly (5) comprises an ejection base plate (22), an ejection panel (23), a support column (24), a limit column (25), a guide column (26), a return spring (27) and an ejector pin (28); the ejection base plate (22) and the ejection panel (23) are fixedly connected and clamped between two side plates (19); one end of the support column (24) abuts against the rear integrated board (20), and the other end passes through the ejection base plate (22) and the ejection panel (23); a plurality of support columns (24) are provided on the ejection base plate (22) and the ejection panel (23); a diagonally opposite corner of the ejection panel (23) is provided on the ejection base plate (22) and the ejection panel (23); Limiting columns (25) are respectively provided, and the height of the limiting columns (25) is lower than that of the supporting columns (24). Guide columns (26) are respectively provided at the four corners of the ejection panel (23), and the guide columns (26) penetrate the rear integrated plate (20). A return spring (27) is provided on the guide columns (26) between the ejection panel (23) and the rear integrated plate (20). An ejector pin (28) is provided on the ejection panel (23), and the ejector pin (28) penetrates the rear integrated plate (20) and the rear core (21) and abuts against the rear end of the impeller assembly (9). An ejection hole (29) is provided in the middle of the rear fixed plate (18).

6. The impeller injection mold according to claim 5, characterized in that: The first slider assembly (8) comprises a first slider seat (30) and a first core-pulling slider (31) fixedly connected thereto, the second slider assembly (10) comprises a second slider seat (32) and a second core-pulling slider (33) fixedly connected thereto, and the third slider assembly (11) comprises a third slider seat (34) and a third core-pulling slider (35) fixedly connected thereto.

7. The impeller injection mold according to claim 6, characterized in that: The first slider seat (30) is provided with a first oblique guide hole (36), the second slider seat (32) and the third slider seat (34) are respectively provided with a second oblique guide hole (37), the front fixed plate (12) is provided with an oblique guide block (38) corresponding to the first oblique guide hole (36) one by one, the oblique guide block (38) drives the first slider assembly (8) to slide when entering and exiting the first oblique guide hole (36), and the front integrated plate (14) is provided with an oblique guide rod (39) corresponding to the second oblique guide hole (37) one by one, the oblique guide rod (39) drives the second slider assembly (10) or the third slider assembly (11) to slide when entering and exiting the second oblique guide hole (37).

8. The impeller injection mold according to claim 7, characterized in that: The front mold (1) further comprises a first cooling water channel (40) and a second cooling water channel (41); the first cooling water channel (40) is arranged in the pressing plate (13), and its water inlet end and water outlet end respectively pass through the pressing plate (13); the second cooling water channel (41) is arranged in the front core (6), and its water inlet end and water outlet end respectively pass through the front core (6) and then pass through the front integrated plate (14).

9. The impeller injection mold according to claim 8, characterized in that: The rear mold (2) further comprises a third cooling water channel (42), the third cooling water channel (42) being arranged in the rear core (21), and having a water inlet end and a water outlet end which respectively pass through the rear core (21) and then pass through the rear integrated plate (20).

10. An impeller injection molding method, characterized in that: The impeller injection mold according to claim 9 is used for injection molding, and the injection molding process includes mold closing, injection molding, cooling and shaping, mold opening and demoulding.

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