Injection mold capable of realizing rapid molding of impeller

Abstract

The invention relates to the field of impeller production, and discloses an injection mold capable of achieving rapid molding of an impeller, the injection mold comprises a first mold base, a second mold base and a rear shell, the first mold base and the rear shell are arranged on the front side and the rear side of the second mold base respectively to form a sealing structure, and a main runner connected with injection molding equipment is arranged in the center in the first mold base; a center runner is formed in the center of the side close to the second die holder, a plurality of branch runners corresponding to the blade forming cavities in a one-to-one mode are evenly arranged with the center runner as the circle center, a fixing ring seat is arranged in the center of the surface of the side, close to the first die holder, of the second die holder, T-shaped sliding grooves are evenly formed in the surface of the fixing ring seat with the center as the circle center, and sliding blocks are slidably installed in the sliding grooves. Forming blocks are installed on the surfaces of the sliding blocks, blade forming cavities are formed between the adjacent forming blocks, hub forming cavities are formed between the forming blocks and the center block, a rotary disc driven by a control air cylinder is rotationally installed in the fixing ring base, and the rotary disc is matched with the first connecting rod through a movement track groove to achieve synchronous opening and closing of the forming blocks.

Description

Technical Field

[0001] The invention relates to the technical field of impeller production, in particular to an injection mold capable of realizing rapid prototyping of an impeller. Background Art

[0002] As a key component of fluid machinery such as pumps, fans and turbines, the manufacturing quality and production efficiency of impellers directly affect the performance of the entire machine. Existing impellers are usually produced by injection molding because they can efficiently produce parts with complex shapes. However, traditional impeller injection molds have some shortcomings in practical applications.

[0003] First, the molten metal flow path of traditional molds is long, and the molten metal is prone to problems such as large flow resistance and uneven filling during the filling process. This may cause defects in the product, such as bubbles, shrinkage holes and warping, affecting product quality. Secondly, the long-distance molten metal flow prolongs the molding cycle, reduces production efficiency, and is not conducive to mass production. In addition, the demolding mechanism design of existing molds is relatively complex, and the product is prone to adhesion to the mold during the demolding process, which increases the difficulty of demolding and may cause damage to the product or wear of the mold.

[0004] In addition, during the mold opening and closing process, the traditional mold lacks an effective linkage mechanism and cannot simultaneously complete the mold opening and demoulding actions. This makes the operation process cumbersome and increases manual intervention and production costs. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides an injection mold capable of realizing rapid prototyping of an impeller, which can shorten the molten metal flow distance, increase the prototyping speed, simplify the demoulding process, and realize rapid and efficient production of the impeller.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: An injection mold capable of realizing rapid prototyping of an impeller, comprising a first mold base, a second mold base and a rear shell, wherein the first mold base and the rear shell are respectively arranged on the front and rear sides of the second mold base to form a sealing structure, a main flow channel is opened in the center of the first mold base, and the end of the main flow channel is connected to an injection molding device; A fixed ring seat is arranged at the center of a side surface of the second mold base close to the first mold base, and sliding grooves are evenly opened on the surface of the fixed ring seat with the center of the circle as the center. The sliding groove structure is T-shaped, and a slider is slidably installed inside the sliding groove. A forming block is installed on the surface of the slider, and two adjacent forming blocks form a blade forming cavity of the impeller. A sealing ring is arranged at the center of one side of the first mold base close to the second mold base, the end face of the sealing ring is in contact with the surfaces of a plurality of molding blocks, a center block is arranged at the center of the surface of the fixed ring seat, and a molding cavity of the wheel hub is formed between the plurality of molding blocks and the center block; The surface of the fixed ring seat is symmetrically provided with receiving holes, and two of the receiving holes are placed on both sides of the central block. A turntable is rotatably installed inside the fixed ring seat, and the turntable controls the plurality of sliders; A linked demoulding mechanism is disposed on the back of the second mold base, and the linked demoulding mechanism is linked with the turntable.

[0007] Furthermore, a central flow channel is opened at the center of one side of the first mold base close to the second mold base, and the central flow channel is connected to the inside of the main flow channel. A plurality of branch flow channels are evenly arranged on the side of the first mold base close to the second mold base with the central flow channel as the center of the circle, and the plurality of branch flow channels correspond one by one to the blade forming cavities. The plurality of central flow channels are all inclined, and the end of the central flow channel away from the second mold base is connected to the main flow channel.

[0008] Furthermore, a first connecting rod is vertically arranged on a side surface of the sliding block away from the forming block, the first connecting rod passes through the sliding groove, and motion track grooves are evenly opened on the surface of the turntable, and the end of the first connecting rod is placed inside the motion track groove.

[0009] Furthermore, a fixing rod is vertically arranged on the arc surface of the turntable, and the fixing rod penetrates the arc surface of the fixed ring seat. A limiting block is arranged on the surface of the fixing rod, and the limiting block slides on the arc surface of the fixed ring seat.

[0010] Furthermore, a control cylinder is fixed on one side of the surface of the second mold base, and a connecting sleeve is hinged on the output end of the control cylinder, and the connecting sleeve slides on the surface of the fixed rod.

[0011] Furthermore, an arc groove is provided on the surface of the fixed ring seat, the arc groove coincides with the center of the fixed ring seat, and the arc groove corresponds to the fixed rod.

[0012] Furthermore, the linked demoulding mechanism includes a second connecting rod vertically mounted on the surface of the fixed rod and a rotating shaft rotating at the center of the back of the second mold base, and the second connecting rod passes through the arc groove.

[0013] Furthermore, a U-shaped fork rod open to the rear is provided at the end of the second connecting rod, a swing rod is vertically installed on the surface of the rotating shaft, and the end of the swing rod is placed inside the U-shaped fork rod.

[0014] Furthermore, a movable sleeve is slidably installed at the center of the first mold base, a spiral track groove is opened on the inner wall of the movable sleeve, the rotating shaft is rotatably placed inside the movable sleeve, a fixed block is arranged on the surface of the rotating shaft, the fixed block is placed inside the spiral track groove, and a top block is symmetrically arranged at the front end of the movable sleeve, and the top block is placed inside the storage hole.

[0015] The present invention provides an injection mold capable of realizing rapid prototyping of an impeller. It has the following beneficial effects: The present invention provides an injection mold capable of realizing rapid prototyping of an impeller, and proposes corresponding solutions to the problems existing in the prior art, such as a too long molten metal flow path, uneven filling, difficult demoulding, and complicated operation procedures.

[0016] First, by setting a main flow channel in the center of the first mold base, the end of the main flow channel is connected to the injection molding equipment to ensure efficient input of the molten liquid; a central flow channel is opened in the center of one side of the first mold base close to the second mold base, and multiple branch flow channels are evenly set with the central flow channel as the center of the circle, and the multiple branch flow channels correspond to the blade molding cavity one by one. This design greatly shortens the flow distance of the molten liquid, reduces the flow resistance of the molten liquid during the filling process, avoids the generation of defects such as uneven filling, bubbles, shrinkage holes and warping, improves product quality and molding speed, and solves the problem of low production efficiency caused by the long flow path of the molten liquid in traditional molds.

[0017] Secondly, a fixed ring seat is set at the center of the side surface of the second mold base close to the first mold base, and a T-shaped slide groove is evenly opened on the surface of the fixed ring seat. A slider is slidably installed inside the slide groove, and a forming block is installed on the surface of the slider. A blade forming cavity is formed between adjacent forming blocks, and a hub forming cavity is formed between the forming block and the center block. Through the rotation of the turntable, the motion track groove and the first connecting rod are used to drive the slider to slide synchronously in the slide groove, thereby realizing the synchronous opening and closing of the forming block. This structure simplifies the complexity of the mold, improves the opening and closing efficiency of the mold, ensures the precise forming of the impeller blades and the hub, and solves the problems of uncoordinated slider movement and low blade forming accuracy in traditional molds.

[0018] In addition, a linkage ejection mechanism is provided on the back of the second mold base, and the linkage ejection mechanism is linked to the turntable. The swing of the fixed rod drives the rotation of the second connecting rod and the rotating shaft, and then the spiral track groove cooperates with the fixed block to drive the movable sleeve to move axially. The front end of the movable sleeve is symmetrically provided with an ejector block. When the mold is opened, the movable sleeve moves forward, and the ejector block exceeds the surface of the fixed ring seat to eject the formed impeller, realizing automatic demolding. This design effectively avoids adhesion between the product and the mold, reduces the difficulty of demolding, prevents damage to the product and wear of the mold, improves production efficiency, and solves the problems of complex demolding mechanism and difficult demolding in traditional molds.

[0019] Through the improvement of the above technical solutions, the present invention effectively shortens the flow path of the molten metal, optimizes the filling process of the molten metal, simplifies the demolding mechanism, realizes the synchronous operation of mold opening and closing and demolding, significantly improves the production efficiency and product quality of the impeller, meets the needs of mass production, and solves many deficiencies in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic structural diagram of the mold base and the rear cover in a separated state of the present invention; Figure 2 For the present invention Figure 1 A schematic diagram of the cross-sectional structure of; Figure 3 For the present invention Figure 2 A schematic diagram of the enlarged structure of area A; Figure 4 It is a schematic diagram of the internal structure of the rear shell of the present invention; Figure 5 It is a schematic diagram of the second mold base structure of the present invention; Figure 6 It is a schematic diagram of the installation structure of the fixed ring seat and the rotating disk of the present invention; Figure 7 It is a schematic diagram of the installation of the second mold base and the linked mold ejection mechanism of the present invention; Figure 8 It is a schematic diagram of the explosion structure of the slider and the turntable of the present invention; Fig. 9 It is a schematic diagram of the rear cross-sectional structure of the second mold base of the present invention; Fig.10 It is a schematic diagram of the installation structure of the rotating shaft and the movable sleeve of the present invention.

[0021] Among them, 1. first mold base; 11. main flow channel; 12. center flow channel; 13. branch flow channel; 14. sealing ring; Second die base; 21, fixed ring base; 22, slide groove; 23, slider; 24, forming block; 25, first connecting rod; 26, turntable; 27, motion track groove; 28, fixed rod; 29, limit block; 210, arc groove; 211, control cylinder; 212, connecting sleeve; 213, center block; 214, storage hole; 3, rear shell; 4. Linked ejection mechanism; 41. Second connecting rod; 42. U-shaped fork rod; 43. Rotating shaft; 44. Swinging rod; 45. Movable sleeve; 46. Ejection block; 47. Spiral track groove; 48. Fixed block. DETAILED DESCRIPTION

[0022] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only 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.

[0023] Embodiment 1: See also Figure 1-10An injection mold capable of realizing rapid prototyping of an impeller comprises a first mold base 1, a second mold base 2 and a rear shell 3; the first mold base 1 and the rear shell 3 are respectively arranged on the front and rear sides of the second mold base 2 to form a sealing structure, thereby ensuring that the molten metal will not leak during the injection molding process and improving the molding quality; a main flow channel 11 is opened in the center of the first mold base 1, and the end of the main flow channel 11 is connected to the injection molding equipment to realize efficient input of the molten metal; this design effectively shortens the flow distance of the molten metal and solves the problems of uneven filling and prolonged molding cycle caused by the excessively long flow path of the molten metal in the traditional mold.

[0024] A fixed ring seat 21 is provided at the center of the surface of one side of the second mold base 2 close to the first mold base 1; a plurality of slide grooves 22 are evenly opened on the surface of the fixed ring seat 21 with its center as the center of the circle, and the structure of the slide groove 22 is T-shaped, which can effectively limit the movement direction of the slider 23 and ensure that the slider 23 slides smoothly inside the slide groove 22; a forming block 24 is installed on the surface of the slider 23, and two adjacent forming blocks 24 form a blade forming cavity of the impeller between each other, and the accuracy of the blade forming cavity is directly related to the performance of the impeller; through this design, the precision forming of the impeller blades can be achieved, the product quality is improved, and the problem that traditional molds cannot effectively form complex blade structures is solved.

[0025] A sealing ring 14 is arranged at the center of one side of the first mold base 1 close to the second mold base 2; the end face of the sealing ring 14 contacts the surfaces of the multiple molding blocks 24 to form a sealed cavity, which prevents the melt from overflowing during the injection molding process and improves the molding accuracy and efficiency; a center block 213 is arranged at the center of the surface of the fixed ring seat 21, and a hub molding cavity is formed between the multiple molding blocks 24 and the center block 213, and the molding cavity is used to mold the hub part of the impeller, thereby ensuring the overall structural strength of the impeller; this design effectively solves the problem of inaccurate hub molding in traditional molds.

[0026] The surface of the fixed ring seat 21 is symmetrically provided with receiving holes 214; the two receiving holes 214 are respectively arranged on both sides of the center block 213 for receiving the top block 46, thereby ensuring the overall compactness of the mold; a turntable 26 is rotatably installed inside the fixed ring seat 21, and the turntable 26 realizes the opening and closing of the forming block 24 and controls the formation and release of the blade forming cavity by controlling the movement of the slider 23; the design of the turntable 26 enables the slider 23 to move synchronously, thereby improving the opening and closing efficiency of the mold and solving the problems of complex demoulding mechanism and cumbersome operation in traditional molds.

[0027] A linked demoulding mechanism 4 is arranged on the back of the second mold base 2; the linked demoulding mechanism 4 is linked with the turntable 26, and the linked demoulding mechanism 4 is driven to work by the swing of the fixed rod 28, thereby realizing the synchronous demoulding operation when opening and closing the mold; this design enables the impeller product to be ejected smoothly while the mold is opening, thereby avoiding adhesion between the product and the mold, reducing manual intervention, improving production efficiency, and solving the problem of difficulty in demoulding of traditional molds.

[0028] See also Figure 1-4 A central runner 12 is provided at the center of one side of the first mold base 1 close to the second mold base 2; the central runner 12 is connected with the inside of the main runner 11 to ensure that the molten metal can smoothly enter the central runner 12 from the main runner 11; a plurality of branch runners 13 are evenly arranged on one side of the first mold base 1 close to the second mold base 2 with the central runner 12 as the center, and the plurality of branch runners 13 correspond to the blade molding cavities one by one, so that the molten metal can be evenly distributed in each blade molding cavity; the plurality of branch runners 13 are all inclined, which optimizes the flow path of the molten metal, reduces the flow resistance of the molten metal, and improves the injection molding efficiency; the end of the central runner 12 away from the second mold base 2 is connected with the main runner 11, so as to realize the rapid transportation of the molten metal and solve the problem of the long flow distance of the molten metal in the traditional mold.

[0029] See also Figure 5-8 A first connecting rod 25 is vertically arranged on the surface of the slider 23 on one side away from the forming block 24; the first connecting rod 25 passes through the slide groove 22 to ensure the stable movement of the slider 23 in the slide groove 22; the surface of the turntable 26 is evenly provided with motion track grooves 27, and the shape design of the motion track groove 27 can effectively control the motion trajectory of the first connecting rod 25; the end of the first connecting rod 25 is placed on the inner side of the motion track groove 27, and when the turntable 26 rotates, the motion track groove 27 cooperates with the first connecting rod 25 to drive the slider 23 to slide in the slide groove 22, thereby realizing the synchronous opening and closing of the forming block 24; this design improves the operating efficiency of the mold and solves the problem of uncoordinated slider movement in traditional molds.

[0030] See also Figure 5-8 A fixing rod 28 is vertically arranged on the arc surface of the turntable 26; the fixing rod 28 penetrates the arc surface of the fixing ring seat 21 and plays a transmission role; a limit block 29 is arranged on the surface of the fixing rod 28, and the limit block 29 slides on the arc surface of the fixing ring seat 21, thereby limiting the movement range of the fixing rod 28 and preventing damage to the mechanism due to excessive rotation; the design of the fixing rod 28 not only connects the turntable 26 and the linked ejection mechanism 4, but also ensures the stability and reliability of the entire transmission mechanism through the action of the limit block 29, thereby solving the problem of unstable transmission mechanism in traditional molds.

[0031] See also Figure 5-8A control cylinder 211 is fixedly installed on one side of the surface of the second mold base 2; a connecting sleeve 212 is hinged at the output end of the control cylinder 211, and the connecting sleeve 212 is slidably installed on the surface of the fixed rod 28; when the control cylinder 211 is working, the fixed rod 28 is driven to swing through the movement of the connecting sleeve 212, and then the turntable 26 is rotated to control the movement of the slider 23; this design utilizes pneumatic control to realize the automatic operation of the mold, improve production efficiency, and solve the problem of manual operation required in traditional molds.

[0032] See also Figure 5-8 An arc groove 210 is provided on the surface of the fixed ring seat 21; the arc groove 210 coincides with the center of the fixed ring seat 21, and the design of the arc groove 210 corresponds to the fixed rod 28; the fixed rod 28 passes through the fixed ring seat 21 through the arc groove 210, and the arc groove 210 provides space for the swing of the fixed rod 28, while limiting the movement trajectory of the fixed rod 28, ensuring that the rotation angle of the turntable 26 meets the design requirements; this structural design improves the precision of the mold, avoids interference between mechanisms, and solves the problem of unreasonable design of moving parts in traditional molds.

[0033] See also Figure 7-10 The linked demoulding mechanism 4 includes a second connecting rod 41 vertically installed on the surface of the fixed rod 28 and a rotating shaft 43 rotating at the back center of the second mold base 2; the second connecting rod 41 passes through the arc groove 210, connecting the fixed rod 28 and the rotating shaft 43; when the fixed rod 28 swings, the rotating shaft 43 is driven to rotate through the action of the second connecting rod 41, thereby realizing the linked operation of the linked demoulding mechanism 4; this design enables the demoulding action to be completed synchronously during the opening and closing process of the mold, thereby improving production efficiency and solving the problem that the demoulding mechanism in the traditional mold cannot be linked.

[0034] See also Figure 7-10 A U-shaped fork rod 42 open to the rear is provided at the end of the second connecting rod 41; a swing rod 44 is vertically installed on the surface of the rotating shaft 43, and the end of the swing rod 44 is placed inside the U-shaped fork rod 42; when the second connecting rod 41 drives the U-shaped fork rod 42 to move, the swing rod 44 swings inside the U-shaped fork rod 42, driving the rotating shaft 43 to rotate; this structure realizes the conversion from linear motion to rotational motion, ensures the normal operation of the linked ejection mechanism 4, and solves the problem of complex transmission structure in traditional molds.

[0035] See also Figure 9-10A movable sleeve 45 is slidably installed in the center of the first mold base 1; a spiral track groove 47 is opened on the inner wall of the movable sleeve 45, and the spiral track groove 47 is used to convert the rotational motion of the rotating shaft 43 into the axial linear motion of the movable sleeve 45; the rotating shaft 43 is rotatably placed inside the movable sleeve 45, and a fixed block 48 is provided on the surface of the rotating shaft 43, and the fixed block 48 is placed inside the spiral track groove 47. When the rotating shaft 43 rotates, the fixed block 48 moves along the spiral track groove 47, driving the movable sleeve 45 to move axially; the front end of the movable sleeve 45 is symmetrically provided with a top block 46, and the top block 46 is placed inside the storage hole 214. When the movable sleeve 45 moves forward, the top block 46 exceeds the surface of the fixed ring seat 21, and the formed impeller is ejected, realizing automatic demolding; this design improves the efficiency of demolding and solves the problem of demolding difficulty in traditional molds.

[0036] Embodiment 2: In view of the problems in the prior art of too long melt flow path and uneven filling, this embodiment provides an improved injection mold design.

[0037] In this embodiment, a main channel 11 is provided in the inner center of the first mold base 1, and the end of the main channel 11 is connected to the injection molding equipment through a standard interface, and the interface specification is DIN 16742 to ensure compatibility with a variety of injection molding machines. The main channel 11 adopts a cylindrical channel with a diameter of 12 mm, and the material is a beryllium copper alloy (model: C17200) with high thermal conductivity to improve the flow efficiency and temperature uniformity of the melt.

[0038] A central flow channel 12 is provided at the center of one side of the first mold base 1 close to the second mold base 2. The diameter of the central flow channel 12 is 8 mm, and it smoothly connects with the main flow channel 11. With the central flow channel 12 as the center, eight branch flow channels 13 are evenly arranged. The diameter of the branch flow channels 13 is 4 mm, and the inclination angle is 45 degrees, corresponding to the blade forming cavity. The length of the branch flow channel 13 is optimized to enable the molten metal to enter the blade forming cavity in the shortest path, thereby reducing the cooling and pressure loss of the molten metal during the flow process.

[0039] To verify the effectiveness of the design, an experimental comparison test was conducted. Polycarbonate (PC) material was selected, with a melting temperature of 250°C, an injection pressure of 90MPa, and an injection speed of 60mm / s.

[0040] The experimental data are as follows:

[0041] The experimental results show that the average filling time is 2.04 seconds, which is 40% shorter than that of traditional molds. The product quality is stable, without any bubbles or shrinkage defects, and the warpage is controlled within 0.05mm. This design effectively solves the problems of uneven filling and low production efficiency caused by the long melt flow path.

[0042] Embodiment 3: In view of the problems of uncoordinated slider movement and low blade forming precision in traditional molds, the slider and turntable mechanism of the mold are optimized in this embodiment.

[0043] A fixed ring seat 21 is provided at the center of the surface of one side of the second die seat 2 close to the first die seat 1. The fixed ring seat 21 is made of high-strength wear-resistant steel (model: H13) and its surface is vacuum quenched. The surface of the fixed ring seat 21 is evenly provided with eight T-shaped slide grooves 22 with the center as the center of the circle. The size of the slide groove 22 is 6mm wide and 12mm deep, ensuring that the slider 23 slides smoothly in the slide groove.

[0044] The slider 23 is processed by high-precision wire cutting. The material is high-speed tool steel (model: M2) and the surface is coated with titanium aluminum nitrogen coating to improve wear resistance and oxidation resistance. The surface of the slider 23 is installed with a forming block 24. The processing accuracy of the forming block 24 reaches ±0.005mm and the surface roughness is Ra0.2μm, ensuring the high precision and high finish of the blade forming cavity. The matching clearance between adjacent forming blocks 24 is strictly controlled within 0.01mm.

[0045] The turntable 26 is installed inside the fixed ring seat 21. The material is high-toughness alloy steel (model: SCM440), and the surface is nitrided. The surface of the turntable 26 is evenly provided with motion track grooves 27. The curve of the motion track groove 27 is designed according to the cubic Bezier curve to ensure that the first connecting rod 25 can synchronously and smoothly drive the slider 23 to move in the slide groove 22 when the turntable 26 rotates.

[0046] In order to verify the accuracy of the slider's synchronous motion, finite element analysis was performed using ANSYS software. The simulation results show that the synchronization error of the slider 23 is less than 0.002mm, meeting the requirements of ultra-high precision molding.

[0047] At the same time, actual production tests were carried out and 1,000 impeller products were produced continuously. The test results are as follows:

[0048] The test results show that the dimensional accuracy and surface quality of the impeller products have reached high-end industrial standards, with a pass rate of 100%. This design effectively solves the problems of uncoordinated slider movement and low blade molding accuracy in traditional molds.

[0049] Embodiment 4: In view of the problem that the demoulding mechanism in the traditional mold is complicated and demoulding is difficult, the present embodiment designs a new linked demoulding mechanism 4 to achieve the synchronous operation of mold opening and closing and demoulding.

[0050] The linked ejection mechanism 4 includes a fixed rod 28, a second connecting rod 41, a rotating shaft 43, a spiral track groove 47 and a movable sleeve 45. The fixed rod 28 is driven by a control cylinder 211 to achieve a swinging motion. The control cylinder 211 uses a cylinder of model SMC CDQ2B32-50 with a maximum output force of 500N to ensure sufficient driving force.

[0051] One end of the second connecting rod 41 is connected to the fixed rod 28, and the other end is connected to the swing rod 44 on the rotating shaft 43 through the U-shaped fork rod 42. The rotating shaft 43 is supported by a high-precision rolling bearing, and the material is high-strength stainless steel (model: 17-4PH), and the surface is mirror polished.

[0052] The surface of the rotating shaft 43 is provided with a fixing block 48, and the fixing block 48 is placed in the spiral track groove 47 on the inner wall of the movable sleeve 45. The spiral angle of the spiral track groove 47 is 20 degrees, which is optimized by a mathematical model to achieve a smooth axial movement of the movable sleeve 45.

[0053] The front end of the movable sleeve 45 is symmetrically provided with a top block 46, which is made of a superhard alloy (model: YG20) and has a surface hardness of HRA90 or above after precision grinding. The top block 46 is placed in the receiving hole 214 on the surface of the fixed ring seat 21.

[0054] During the mold opening process, the control cylinder 211 drives the fixed rod 28 to swing, and through the linked demoulding mechanism 4, the movable sleeve 45 moves forward, and the ejector block 46 exceeds the surface of the fixed ring seat 21, ejecting the formed impeller. This process is synchronized with the mold opening action, and the entire demoulding process is smooth and unobstructed.

[0055] In order to evaluate the automatic demoulding effect, a large-scale production test was carried out, and the test data are as follows:

[0056] The experimental results show that the average demoulding time is 0.8 seconds, the demoulding success rate and product integrity rate are both 100%, and the mold wear is negligible. This design significantly improves production efficiency and completely solves the problems of difficult demoulding and easy mold damage in traditional molds.

[0057] Through the above embodiments, the present invention successfully solves the key problems in the prior art, realizes the rapid, high-precision and high-efficiency molding of the impeller, significantly improves the product quality and production efficiency, and has broad industrial application prospects.

[0058] Working principle: When in use, the rear shell 3 and the second mold base 2 are kept fixed to seal and protect the back of the second mold base 2, and then the first mold base 1 and the second mold base 2 are respectively installed on both sides of the injection molding machine, and the main channel 11 is connected with the injection port. When closing the mold, the connecting sleeve 212 is driven to move by the control cylinder 211, and then the turntable 26 is driven to rotate by the fixed rod 28. When the turntable 26 rotates, the sliding block 23 is driven to slide inside the sliding groove 22 through the cooperation of the motion track groove 27 and the first connecting rod 25. When multiple sliding blocks 23 are close to each other, the surface of the sliding blocks 23 is The multiple molding blocks 24 are closed, a hub molding cavity is formed between the multiple molding blocks 24 and the center block 213, and a blade molding cavity is formed between two adjacent molding blocks 24, and then the first mold base 1 and the second mold base 2 are controlled to close the mold, so that the end surface of the sealing ring 14 contacts the multiple molding blocks 24 to form a sealed cavity, and then the molten metal is injected into the main flow channel 11 under high pressure, and the molten metal will enter the hub molding cavity through the center flow channel 12, and will also flow into the blade molding cavity through the multiple branch flow channels 13, so as to realize rapid injection molding, reduce the flow distance of the molten metal, and increase the molding speed; At the same time, when the mold is opened and closed, the rotation of the turntable 26 can drive the linked ejection mechanism 4 to work through the fixed rod 28, and the swing of the fixed rod 28 can drive the swing rod 44 to swing through the second connecting rod 41, and the swing angle and direction are consistent with the turntable 26. At this time, the rotating shaft 43 will also rotate at a certain angle. When the rotating shaft 43 rotates, it can move axially through the fixed block 48 and the matching movable sleeve 45 of the spiral track groove 47; The moving direction of the movable sleeve 45 when opening and closing the mold is that when opening the mold, the slider 23 separates the movable sleeve 45 and moves axially forward. At this time, the ejector block 46 can exceed the surface of the fixed ring seat 21 to eject the formed impeller and realize linked demolding. Conversely, when closing the mold, when the forming block 24 moves toward the center, the movable sleeve 45 moves backward. When the forming block 24 moves into place, the ejector block 46 moves in.

[0059] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An injection mold capable of realizing rapid prototyping of an impeller, comprising a first mold base (1), a second mold base (2) and a rear shell (3), characterized in that: The first mold base (1) and the rear shell (3) are respectively placed on the front and rear sides of the second mold base (2) to form a sealing structure; a main flow channel (11) is opened in the center of the first mold base (1), and the end of the main flow channel (11) is connected to the injection molding equipment; A fixed ring seat (21) is arranged at the center of a side surface of the second mold base (2) close to the first mold base (1); a surface of the fixed ring seat (21) is evenly provided with slide grooves (22) with the center of the fixed ring seat (21) as the center of the circle; the slide groove (22) is T-shaped; a slider (23) is slidably mounted inside the slide groove (22); a molding block (24) is mounted on the surface of the slider (23); two adjacent molding blocks (24) form a blade molding cavity of the impeller; A sealing ring (14) is arranged at the center of one side of the first mold base (1) close to the second mold base (2), the end surface of the sealing ring (14) is in contact with the surfaces of a plurality of molding blocks (24), a center block (213) is arranged at the center of the surface of the fixed ring base (21), and a molding cavity of the wheel hub is formed between the plurality of molding blocks (24) and the center block (213); The surface of the fixed ring seat (21) is symmetrically provided with receiving holes (214), and the two receiving holes (214) are arranged on both sides of the central block (213). A rotating disk (26) is rotatably installed inside the fixed ring seat (21), and the rotating disk (26) controls the plurality of sliders (23); A linked demoulding mechanism (4) is provided on the back of the second mold base (2), and the linked demoulding mechanism (4) is linked to the rotating disk (26).

2. The injection mold capable of realizing rapid prototyping of an impeller according to claim 1, characterized in that: A central flow channel (12) is provided at the center of one side of the first mold base (1) close to the second mold base (2), and the central flow channel (12) is connected to the inside of the main flow channel (11). A plurality of branch flow channels (13) are evenly arranged on one side of the first mold base (1) close to the second mold base (2) with the central flow channel (12) as the center of the circle, and the plurality of branch flow channels (13) correspond to the blade molding cavities one by one. The plurality of central flow channels (12) are all arranged at an inclination, and the end of the central flow channel (12) away from the second mold base (2) is connected to the main flow channel (11).

3. The injection mold capable of realizing rapid prototyping of an impeller according to claim 2, characterized in that: A first connecting rod (25) is vertically arranged on a side surface of the sliding block (23) facing away from the forming block (24), the first connecting rod (25) passes through the sliding groove (22), and a motion track groove (27) is evenly formed on the surface of the rotating disk (26), and an end of the first connecting rod (25) is placed inside the motion track groove (27).

4. The injection mold capable of realizing rapid prototyping of an impeller according to claim 3, characterized in that: A fixing rod (28) is vertically arranged on the arc surface of the rotating disk (26), the fixing rod (28) penetrates the arc surface of the fixing ring seat (21), and a limiting block (29) is arranged on the surface of the fixing rod (28), the limiting block (29) slides on the arc surface of the fixing ring seat (21).

5. The injection mold capable of realizing rapid prototyping of an impeller according to claim 4, characterized in that: A control cylinder (211) is fixed to one side of the surface of the second mold base (2), a connecting sleeve (212) is hingedly connected to the output end of the control cylinder (211), and the connecting sleeve (212) slides on the surface of the fixing rod (28).

6. The injection mold capable of realizing rapid prototyping of an impeller according to claim 4, characterized in that: An arc groove (210) is provided on the surface of the fixed ring seat (21), the arc groove (210) coincides with the center of the fixed ring seat (21), and the arc groove (210) corresponds to the fixed rod (28).

7. The injection mold capable of realizing rapid prototyping of an impeller according to claim 4, characterized in that: The linked demoulding mechanism (4) comprises a second connecting rod (41) vertically mounted on the surface of the fixed rod (28) and a rotating shaft (43) rotating at the back center of the second mold base (2), wherein the second connecting rod (41) passes through the arc groove (210).

8. The injection mold capable of realizing rapid prototyping of an impeller according to claim 7, characterized in that: A rearwardly open U-shaped shift fork rod (42) is provided at the end of the second connecting rod (41), a swing rod (44) is vertically mounted on the surface of the rotating shaft (43), and the end of the swing rod (44) is placed inside the U-shaped shift fork rod (42).

9. The injection mold capable of realizing rapid prototyping of an impeller according to claim 8, characterized in that: A movable sleeve (45) is slidably mounted at the center of the first mold base (1); a spiral track groove (47) is formed on the inner wall of the movable sleeve (45); the rotating shaft (43) is rotatably disposed inside the movable sleeve (45); a fixed block (48) is disposed on the surface of the rotating shaft (43); the fixed block (48) is disposed inside the spiral track groove (47); a top block (46) is symmetrically disposed at the front end of the movable sleeve (45); the top block (46) is disposed inside the receiving hole (214).

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