Impeller injection mold facilitating demolding

Abstract

This application provides an impeller injection mold for easy demolding, relating to the field of impeller injection molding technology. The easy-to-demold impeller injection mold includes a fixed mold core formed by a base and an upper seat, and a movable mold core capable of linear displacement. Multiple splicing templates are symmetrically arranged in a ring above the upper seat, and these templates are driven to linear displacement by push rods penetrating their inner surfaces. Injection groove one and injection groove two are respectively provided on both sides of the splicing templates for injection molding impeller blades. This solution achieves rapid mold opening and closing through the cooperation of the movable mold core, push rods, and the inclined grooves of the injection mold. Combined with a locking assembly to ensure injection sealing and a lower mold push mechanism to assist demolding, it effectively achieves rapid and stable demolding of impeller products, improving production efficiency and reducing product loss.

Description

Technical Field

[0001] This application relates to the field of impeller injection molding technology, and more specifically, to an impeller injection mold that is easy to demold. Background Technology

[0002] As a core component in fluid machinery, the impeller is widely used in equipment such as water pumps, fans, blowers, and compressors. Its structure usually consists of a hub and multiple blades distributed along the circumference of the hub. The curvature and dimensional accuracy of the blades directly affect the hydrodynamic performance of the impeller.

[0003] In the mass production of impellers, injection molding has become the mainstream process due to its advantages such as high molding efficiency, good product consistency, and low production cost. The corresponding impeller injection mold is the key equipment for realizing this process. In the prior art, for example, an impeller injection mold with easy demolding according to application number 202320356709.X, its structure mostly adopts an integral mold core or a simple split mold core design. After the impeller injection molding is completed, the demolding process usually relies on a single ejector mechanism or manual assistance.

[0004] However, due to the complex curved surface structure of the impeller blades and the strong adhesion force between the impeller and the mold cavity after injection molding, existing demolding methods generally suffer from the following problems: On the one hand, a single ejector mechanism is insufficient to ensure that the impeller is evenly disengaged from the mold core, easily leading to defects such as impeller blade deformation and breakage, affecting product qualification rate; on the other hand, the disassembly and reassembly of the split mold core is cumbersome, requiring multiple sets of drive mechanisms to operate in steps, resulting in an excessively long demolding cycle and severely restricting production efficiency. Especially in mass production scenarios, the aforementioned problem of "inability to demold quickly and stably" is even more prominent, not only increasing production time costs but also increasing product losses caused by improper demolding, making it difficult to meet the industrial production demand for efficient and high-quality injection molding. Summary of the Invention

[0005] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes an impeller injection mold that facilitates demolding. The mold opens and closes quickly by the cooperation of the moving mold core, the push rod, and the inclined groove of the injection mold. Combined with the locking assembly to ensure the injection sealing and the lower mold push mechanism to assist demolding, the impeller product can be demolded quickly and stably, thereby improving production efficiency and reducing product loss.

[0006] According to an embodiment of this application, an impeller injection mold that is easy to demold includes a fixed mold core formed by a base and an upper seat, and a movable mold core that can move linearly. Multiple splicing templates are symmetrically arranged in a ring above the upper seat, and the splicing templates are driven to move linearly by push rods that penetrate through their inner surfaces.

[0007] The two sides of the splicing template are respectively provided with injection groove one and injection groove two for injection molding impeller blades. The injection groove one and injection groove two in the two splicing templates that fit together form an impeller injection cavity.

[0008] An upper mold is installed through the center of the moving mold core. A protruding plate is integrally formed at the bottom of the upper mold and is used to seal the end face of the impeller injection cavity. A lower mold capable of linear displacement is installed through the inner surface of the upper seat and is used to seal the bottom surface of the impeller injection cavity. A push rod is installed through the center of the surface of the lower mold. The impeller injection cavity, together with the protruding plate, the lower mold, and the push rod, forms a sealed injection cavity for the injection molding of the impeller product.

[0009] According to some embodiments of this application, the upper seat has an installation groove at its end, and an assembly plate is installed in the middle of the inner cavity of the installation groove. Multiple splicing templates are slidably disposed on the outer surface of the assembly plate, and a limiting seat is provided between two splicing templates to limit their movement.

[0010] According to some embodiments of this application, a baffle is provided on one side of the bottom of the splicing template, and the splicing template slides in contact with the baffle. A connecting column is provided through the surface of the baffle, and an abutment block is connected to the top of the connecting column. The bottom of the splicing template is provided with a positioning groove, and the positioning groove and the abutment block are used in conjunction.

[0011] According to some embodiments of this application, a locking component is provided below the connecting column, and the abutment block cooperates with the locking component to lock the splicing template, so as to tightly splice multiple splicing templates together.

[0012] According to some embodiments of this application, the locking assembly includes a mounting plate 1 disposed below the connecting post, and a plurality of outer retaining cylinders are arranged in a ring at the end of the mounting plate 1, and a spring 1 is disposed inside the outer retaining cylinder, wherein the top of the spring 1 is connected to the bottom of the connecting post.

[0013] According to some embodiments of this application, the inner cavity of the outer fixed cylinder and the bottom of the spring one are provided with a bottom plate for sliding sealing, and the upper and lower ends of the inner cavity of the outer fixed cylinder and the spring one are integrally formed with a ring plate one and a ring plate two.

[0014] According to some embodiments of this application, an annular air tube is embedded in the bottom of the mounting plate, and the input end of the annular air tube is connected to a connecting air tube. At the same time, multiple sets of guide air tubes are connected to the surface of the annular air tube, and the surface of the guide air tube penetrates the mounting plate and is connected to a nozzle.

[0015] According to some embodiments of this application, the locking assembly includes a second mounting plate disposed below the connecting post. The outer surface of the second mounting plate is provided with a plurality of rotating cylinders arranged in a ring array. The top of the rotating cylinder is connected to a turntable, and the inner ring of the turntable is slidably connected to a support plate.

[0016] According to some embodiments of this application, the bottom of the support plate is movably connected to a spring two via a connecting plate, the outer surface of the support plate is connected to a positioning post, and a limiting groove is formed through the surface of the turntable on one side of the positioning post.

[0017] According to some embodiments of this application, a through groove is provided on the surface of the turntable and on one side of the limiting groove. A rotating disk is rotatably provided on the inner ring of the top of the second mounting disk, and a connecting plate is sleeved on the bottom of the outer surface of the rotating cylinder. An electric push rod is movably connected to the top side of the second mounting disk through a rotating shaft, and multiple sets of push plates are movably connected to the top of the rotating disk through a rotating shaft.

[0018] The beneficial effects of this application are as follows: In the initial state, the moving mold core is in a low position, and the push rod connected to its bottom is in the inclined groove of the splicing template. At this time, multiple splicing templates are relatively contracted and fit together on the assembly plate. The abutment block is inserted into the outer positioning groove at the bottom of the splicing template. The locking component works synchronously to stably lock the splicing template, ensuring that adjacent splicing templates fit tightly together. The injection groove one and injection groove two on its surface cooperate to form a complete impeller injection cavity for impeller product injection molding. At the same time, the linear pushing mechanism that drives the moving mold core moves, causing the moving mold core and the upper mold installed through the middle of its surface to move down synchronously. The convex plate at the bottom of the upper mold moves accordingly and seals the end face of the impeller injection cavity. At the same time, the lower mold in the upper seat moves up to fit with the bottom surface of the impeller injection cavity to achieve bottom sealing. The end of the push rod on the surface of the lower mold passes through the convex plate. In the through hole, the impeller injection cavity, together with the convex plate, the lower mold and the ejector rod, finally forms a closed injection cavity. During the injection operation, the injection material is transported to the feeding channel of the upper mold. The material is smoothly injected into the injection cavity through the feeding channel. After the material is formed into an impeller product in the injection cavity, the linear pushing mechanism drives the moving mold core to move the upper mold upward synchronously. During the upward movement of the moving mold core, the push rod slides along the inclined groove. The linear displacement of the push rod is converted into a force that pushes the splicing template to move outward linearly on the assembly plate, so that multiple splicing templates are relatively unfolded. During this process, the abutment block is dislodged from the outer positioning groove and finally inserted into the inner positioning groove. The locking component releases the locking of the splicing template. Then, the connecting rod in the lower mold is driven to move the lower mold and the ejector rod upward together, ejecting the formed impeller product from the injection-related structure, completing the entire injection and demolding operation.

[0019] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure assembly of an impeller injection mold that is easy to demold, according to an embodiment of this application;

[0022] Figure 2 This is a front sectional view of the overall structure of an impeller injection mold that facilitates demolding, according to an embodiment of this application.

[0023] Figure 3 This is a schematic diagram of the mold core structure according to an embodiment of this application;

[0024] Figure 4 This is a second schematic diagram of the mold core structure according to an embodiment of this application;

[0025] Figure 5 This is a schematic diagram of the assembly structure of the injection mold, upper mold, and lower mold according to an embodiment of this application;

[0026] Figure 6 This is a schematic front sectional view of the injection mold, upper mold, and lower mold structure according to an embodiment of this application;

[0027] Figure 7 According to the embodiments of this application Figure 6 Enlarged schematic diagram of the structure at point A in the middle;

[0028] Figure 8 This is an exploded perspective view of the injection mold, upper mold, and lower mold structure according to an embodiment of this application;

[0029] Figure 9 This is a bottom view of the upper mold structure according to an embodiment of this application;

[0030] Figure 10 This is a schematic diagram of a multi-injection mold forming an injection cavity structure according to an embodiment of this application;

[0031] Figure 11 This is a schematic diagram of the upper mold, lower mold, and assembly plate structure according to an embodiment of this application;

[0032] Figure 12 This is a front sectional view of the upper mold, lower mold, and assembly plate structure according to an embodiment of this application;

[0033] Figure 13This is one of the exploded schematic diagrams of a single injection mold and a single baffle structure according to an embodiment of this application;

[0034] Figure 14 This is the second exploded view of a single injection mold and a single baffle structure according to an embodiment of this application;

[0035] Figure 15 This is a schematic diagram of the cavity shapes of injection groove one and injection groove two of the injection mold according to an embodiment of this application;

[0036] Figure 16 This is a schematic diagram of the overall structure assembly of the first embodiment of the locking component according to the present application;

[0037] Figure 17 This is a second schematic diagram of the overall structure assembly of the locking component according to the first embodiment of this application;

[0038] Figure 18 This is a bottom view of the installation disk structure according to an embodiment of this application;

[0039] Figure 19 According to the embodiments of this application Figure 18 Schematic diagram of the section cut at point AA along the middle;

[0040] Figure 20 According to the embodiments of this application Figure 19 Enlarged schematic diagram of the structure at point B;

[0041] Figure 21 This is a schematic diagram of the overall structure assembly of the second embodiment of the locking component according to the present application;

[0042] Figure 22 This is a bottom view of the installation disk two structure according to an embodiment of this application;

[0043] Figure 23 According to the embodiments of this application Figure 22 Schematic diagram of the cross section at point BB;

[0044] Figure 24 This is a cross-sectional schematic diagram of the rotating drum structure according to an embodiment of this application;

[0045] Figure 25 This is a schematic diagram of an impeller product manufactured using an impeller injection mold according to an embodiment of this application;

[0046] Figure 26 This is a bottom view schematic diagram of an impeller product manufactured using an impeller injection mold according to an embodiment of this application.

[0047] Icons: 100, Base; 110, Upper Seat; 120, Limit Seat; 130, Assembly Plate; 200, Moving Mold Core; 210, Injection Flow Pipe; 300, Splicing Template; 301, Inclined Slot; 302, Injection Slot One; 303, Injection Slot Two; 304, Positioning Slot; 300a, Injection Cavity; 310, Ejector Rod; 400, Upper Mold; 410, Protruding Plate; 420, Lower Mold; 421, Ejector Rod; 422, Connecting Rod; 500, Baffle; 510, Abutment Block; 520, Connecting Column; 600, Installation Component 1; 610, Annular air pipe; 611, Connecting air pipe; 612, Guide air pipe; 620, Nozzle; 630, Outer fixed cylinder; 631, Ring plate 1; 632, Ring plate 2; 640, Base plate; 650, Spring 1; 700, Mounting plate 2; 710, Rotating cylinder; 711, Connecting plate; 720, Turntable; 721, Through groove; 722, Limiting groove; 730, Support plate; 740, Positioning column; 750, Spring 2; 760, Mounting base; 770, Rotating disc; 771, Push plate; 780, Electric push rod. Detailed Implementation

[0048] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0049] like Figures 1-15 As shown in the embodiment of this application, an impeller injection mold that is easy to demold includes a fixed mold core formed by a base 100 and an upper seat 110, and a movable mold core 200 capable of linear displacement. The movable mold core 200 is located above the fixed mold core and is driven by a "linear pushing mechanism" installed on its upper end. In actual use, the "linear pushing mechanism" can be an electric push rod, hydraulic rod, or other device capable of linearly moving the movable mold core 200 back and forth. The "linear pushing mechanism" is not shown in the figure in this solution.

[0050] like Figure 4 and Figure 5 As shown, multiple splicing templates 300 are symmetrically arranged in a ring above the upper seat 110. The figure shows that there are thirteen splicing templates 300. The splicing templates 300 are driven to make linear displacement by push rods 310 that penetrate through their inner surfaces.

[0051] like Figure 6 and Figures 13 to 15As shown, an inclined groove 301 is obliquely opened through one end of the surface of the splicing template 300, and a push rod 310 is slidably inserted into the inclined groove 301. The end of the push rod 310 is connected to the bottom of the moving mold core 200. When the moving mold core 200 drives the push rod 310 to move linearly upward, it can push the splicing template 300 to move linearly at the end of the assembly plate 130. In this way, multiple splicing templates 300 can be relatively unfolded under the action of the linear upward movement of the push rod 310, and when the push rod 310 moves linearly downward... In this situation, multiple splicing templates 300 can be driven to shrink relatively. Thus, after the splicing templates 300 are merged, the injection grooves 302 and 303 of adjacent splicing templates 300 cooperate to form an impeller injection cavity. The protruding plate 410, mentioned later, seals the end of the impeller injection cavity, and the lower mold 420 and ejector pin 421 seal the bottom of the impeller injection cavity, forming a complete and sealed injection cavity 300a. Products injection molded using the injection cavity 300a, such as... Figure 25 and Figure 26 As shown.

[0052] Specifically, such as Figures 13 to 15 As shown, injection groove 1 302 and injection groove 2 303 are respectively provided on both sides of the splicing template 300 for injection molding impeller blades. The injection groove 1 302 and injection groove 2 303 in two splicing templates 300 that fit together form an impeller injection molding cavity. When multiple sets of splicing templates 300 shrink relative to each other and their surfaces are sealed together, the injection groove 1 302 and injection groove 2 303 provided between two adjacent splicing templates 300 form an impeller injection molding cavity for injection molding a single impeller blade. The figure shows thirteen splicing templates 300, thus forming an impeller with thirteen blades. The specific number of impeller blades can be set according to the actual needs in actual use.

[0053] Specifically, such as Figure 2 as well as Figure 9 As shown, an upper mold 400 is installed through the center of the surface of the moving mold core 200. The upper mold 400 moves linearly with the moving mold core 200. A protruding plate 410 is integrally formed at the bottom of the upper mold 400. The protruding plate 410 is used to seal the end face of the impeller injection cavity. A lower mold 420 capable of linear displacement is installed through the inner surface of the upper seat 110. The lower mold 420 is used to seal the bottom face of the impeller injection cavity. A push rod 421 is installed through the center of the surface of the lower mold 420. The end of the push rod 421 passes through the through hole opened at the bottom of the surface of the protruding plate 410. The impeller injection cavity, together with the protruding plate 410, the lower mold 420 and the push rod 421, forms a closed injection cavity 300a. The injection cavity 300a is used for injection molding of impeller products.

[0054] Furthermore, such as Figure 3 , Figure 8 and Figure 9 As shown, an injection flow pipe 210 is installed between the fixed mold core and the moving mold core 200, and a material supply channel is provided on the surface of the upper mold 400; the output end of the injection flow pipe 210 is connected to the material supply channel on the surface of the upper mold 400, and the material outlet of the material supply channel is connected to the cavity of the injection cavity 300a, so as to supply material into the injection cavity 300a for injection molding.

[0055] Specifically, such as Figure 6 and Figure 7 As shown, multiple connecting rods 422 are installed through the inner surface of the lower mold 420. The connecting rods 422 are pushed linearly back and forth by a drive device such as an electric push rod or a hydraulic cylinder at their bottom end. After the product is injection molded through the injection cavity 300a, the upper moving mold core 200 and the upper mold 400 move outward through the push rod 310 to unfold the splicing template 300. Then, the lower mold 420 is pushed by the drive device to push the molded impeller product upward to complete the demolding.

[0056] like Figure 3 As shown, the upper seat 110 has an installation groove at its end. The installation groove is used to install the splicing template 300, the limiting seat 120, the assembly plate 130 and the locking component. The locking component is located below the assembly plate 130. The assembly plate 130 is located in the middle of the inner cavity of the installation groove. The splicing template 300 is slidably located on the end surface of the assembly plate 130. The limiting seat 120 is located on the top outer ring of the installation groove.

[0057] Specifically, an assembly plate 130 is installed in the middle of the inner cavity of the mounting slot. Multiple splicing templates 300 are slidably disposed on the outer surface of the assembly plate 130. A limiting seat 120 is provided between two splicing templates 300 to limit their movement. The limiting seat 120 and the assembly plate 130 are in sliding contact. Under the action of the limiting seat 120, the movement direction of the splicing templates 300 can be restricted, so that they can only move in a straight line.

[0058] A baffle 500 is provided on one side of the bottom of the splicing template 300. The baffle 500 is installed in the mounting groove of the upper seat 110 and fixedly connected to its side wall. The splicing template 300 and the baffle 500 are in sliding contact. A connecting column 520 is provided through the surface of the baffle 500. An abutment block 510 is connected to the top of the connecting column 520. The abutment block 510 is conical.

[0059] The bottom of the splicing template 300 is provided with a positioning groove 304, which is used in conjunction with the abutment block 510; the outer edge of the positioning groove 304 is rounded.

[0060] In this design, at least two positioning slots 304 are provided. The positioning slots 304, together with the abutment blocks 510 on the connecting column 520, achieve positioning and restraint of the splicing template 300. The abutment blocks 510 are inserted into the positioning slots 304, preventing the splicing template 300 from moving linearly. Therefore, the two positioning slots 304 opened on the bottom wall of the splicing template 300 in this design represent the maximum range of displacement, expansion, and contraction of the splicing template 300. After multiple splicing templates 300 expand outwards, causing the abutment blocks 510 to insert into the inner positioning slots 304, the splicing template 300 can no longer move. Similarly, after multiple splicing templates 300 contract inwards, causing the abutment blocks 510 to insert into the outer positioning slots 304, the splicing template 300 can no longer move.

[0061] like Figure 16 and Figure 24 As shown, when multiple splicing templates 300 shrink inward and fit together, the abutment block 510 inserts into the corresponding positioning groove 304 to limit the inner splicing template 300, but cannot securely limit the splicing template 300. When the splicing template 300 is under force, it is very easy for the multiple splicing templates 300 to not fit tightly together, which can easily cause burrs to appear at the edge of the injection-molded impeller. To address this, a locking component is added to the above-mentioned technology. Specifically, the locking component is located below the connecting column 520, and the abutment block 510 works with the locking component to lock the splicing template 300, so that the multiple splicing templates 300 fit together tightly. This avoids the abutment block 510 being unable to lock the splicing template 300 when multiple splicing templates 300 are assembled, resulting in gaps between the multiple splicing templates 300, affecting the injection molding of the impeller product, and causing large burrs in the molded impeller product.

[0062] The following describes various methods for locking the splicing template 300.

[0063] like Figures 16 to 20 As shown, this is a first embodiment of the locking assembly. Specifically, the locking assembly includes a mounting plate 600 disposed below the connecting column 520. The mounting plate 600 is installed in the mounting groove of the upper seat 110. Multiple sets of outer retaining cylinders 630 are arranged in a ring at the end of the mounting plate 600, and the multiple sets of outer retaining cylinders 630 are embedded in the surface of the mounting plate 600. The inner wall of the outer retaining cylinder 630 slides in contact with the outer wall of the connecting column 520. A spring 650 is disposed inside the outer retaining cylinder 630. The top of the spring 650 is connected to the bottom of the connecting column 520. When the splicing template 300 moves, the splicing template 300 presses the connecting column 520, causing the spring 650 to compress until the abutment block 510 is inserted into the positioning groove 304. After that, the spring 650 is free from external force restraint and drives the nozzle 620 and the annular air pipe 610 to insert into the corresponding positioning groove 304, thereby locking the splicing template 300.

[0064] A base plate 640 is slidably sealed within the inner cavity of the outer fixed cylinder 630 and located at the bottom of the first spring 650. The base plate 640 is fixedly connected to the opposite side of the first spring 650. Annular plates 631 and 632 are integrally formed at the upper and lower ends of the outer fixed cylinder 630 and located at the first spring 650. The first annular plate 631 and the second annular plate 632 are used to limit the position of the base plate 640. In the initial state, the bottom of the base plate 640 is in contact with the top of the second annular plate 632, and the second annular plate 632 is used to support the base plate 640.

[0065] An annular air tube 610 is embedded in the bottom of the mounting plate 600. The input end of the annular air tube 610 is connected to a connecting air tube 611. The input end of the connecting air tube 611 is connected to an external air pump via a pipeline. Meanwhile, multiple sets of guide air tubes 612 are connected to the surface of the annular air tube 610. The surface of the guide air tubes 612 penetrates the mounting plate 600 and is connected to a nozzle 620. The nozzle 620 is installed at the bottom of the inner cavity of the mounting plate 600. When the air pump operates, it pressurizes the gas and ultimately delivers it to the mounting plate through the nozzle 620. At the bottom of the inner cavity of disc 600, the base plate 640 is moved upward, and then the base plate 640 is moved upward until it fits against the ring plate 631. At this time, the spring 650 is in the final compressed state. In this way, the connecting column 520 is used to drive the abutment block 510 to be tightly inserted into the positioning groove 304. At this time, the splicing template 300 cannot move at will. Finally, during the injection molding process of the impeller, multiple sets of splicing templates 300 can fit together tightly, avoiding large burrs on the surface of the impeller after injection molding.

[0066] In practical use, a pressure sensor is embedded in the outer fixed cylinder 630 to detect the pressure inside the outer fixed cylinder 630. At the same time, a distance sensor is embedded in the surface of the ring plate 631 to detect the moving distance of the base plate 640 so as to control and adjust the moving position of the base plate 640.

[0067] Furthermore, a telescopic rod is installed on the surface of the base plate 640 and inside the spring 650. The telescopic rod, together with the outer fixing cylinder 630, enables the connecting column 520 to make linear displacement and avoids deviation.

[0068] like Figures 21 to 24As shown, this is a second embodiment of the locking assembly. Specifically, the locking assembly includes a second mounting plate 700 disposed below the connecting post 520. The second mounting plate 700 is installed in the mounting groove of the upper seat 110. Multiple sets of rotating cylinders 710 are arranged in a ring array on the outer surface of the second mounting plate 700. A slip ring is slidably disposed at the bottom of the rotating cylinder 710. The bottom of the slip ring is fixedly connected to the top of the second mounting plate 700. The rotating cylinder 710 slides within the slip ring. A turntable 720 is connected to the top of the rotating cylinder 710. A support plate 730 is slidably connected to the inner ring of the turntable 720. The bottom of the connecting post 520 and the top of the support plate 730 are movably connected by a bearing.

[0069] The bottom of the support plate 730 is movably connected to a second spring 750 via a connecting plate. The movable connection described here is, for example, a bearing connection. The bottom of the second spring 750 is connected to a mounting base 760, and the bottom of the mounting base 760 is connected to the top of the second mounting plate 700. The mounting base 760 assists in supporting the second spring 750. The second spring 750 of the locking assembly in the second embodiment has the same function as the first spring 650 in the first embodiment.

[0070] Specifically, the outer surface of the support plate 730 is connected to the positioning post 740, and the surface of the turntable 720 and the side of the positioning post 740 are provided with a limiting groove 722. When the splicing template 300 moves, the abutment block 510 drives the connecting post 520 to press down on the support plate 730, and the support plate 730 drives the second spring 750 to compress, so that the support plate 730 drives the positioning post 740 to move straight down through the limiting groove 722. When the abutment block 510 is inserted into the positioning groove 304, the second spring 750 returns to its original position, driving the support plate 730 and the positioning post 740 to move upward.

[0071] A through groove 721 is provided on the surface of the turntable 720 and on one side of the limiting groove 722. When the rotating cylinder 710 is rotated, it can drive the turntable 720 to rotate at a certain angle, so that the through groove 721 is below the positioning post 740. At this time, the support plate 730 is locked, and the abutment block 510 is tightly inserted into the corresponding positioning groove 304. The multiple sets of splicing templates 300 cannot be deflected by force and can only be tightly attached together to avoid burrs after the impeller is injection molded.

[0072] Specifically, to drive the rotating drum 710, a rotating disk 770 is rotatably mounted on the inner ring of the top of the mounting plate 2 700, while a connecting plate 711 is fitted onto the bottom of the outer surface of the rotating drum 710. Simultaneously, an electric actuator 780 is movably connected to one side of the top of the mounting plate 2 700 via a rotating shaft. The output end of the electric actuator 780 is movably connected to the surface of the rotating disk 770 via a rotating shaft. Multiple sets of push plates 771 are movably connected to the top of the rotating disk 770 via a rotating shaft, with the other end of each push plate 771 connected to the surface of an adjacent connecting plate 711 via a rotating shaft. Thus, when the output end of the electric actuator 780 extends or retracts, it can drive the rotating disk 770. When the cylinder 70 is rotated to a certain angle, the multiple push plates 771 on its surface pull the corresponding connecting plates 711, thereby causing the rotating cylinder 710 and the turntable 720 to move, thereby adjusting the position of the through groove 721 and the limiting groove 722. In actual use, if it is necessary to adjust the expansion or contraction of multiple splicing templates 300, it is only necessary to adjust the limiting groove 722 to be below the positioning post 740. When injection molding impeller products, the through groove 721 is adjusted to be in the position of the positioning post 740 to limit the positioning post 740 and the support plate 730, which can control the abutment block 510 to be tightly pressed against the positioning groove 304 and lock the splicing template 300.

[0073] Specifically, as a further optimization of this solution, an angle sensor can be installed on the surface of the turntable 720, which is controlled by an externally set controller to detect the rotation angle of the drum 710 and the turntable 720.

[0074] In practical use, this solution uses a controller as its core. The pressure sensor of the outer fixed cylinder (630), the distance sensor of the ring plate 631, and the angle sensor of the turntable collect data in real time and transmit it to the controller. After receiving the signal, the controller accurately controls the start and stop of the linear push mechanism driving the moving mold core (200), adjusts the air pump pressure supplying air to the annular air pipe (610), and can also control the electric push rod of the push linkage (422) and the electric push rod (780) driving the rotating disk (770). When the sensor detects that the injection mold (300) is in place or the base plate (640) is in position, the controller triggers the locking component to lock. After injection is completed, the controller sequentially instructs the linear push mechanism to lift the mold core (200) and depressurize the air pump, and then drives the electric push rod to eject the product, realizing the coordination of various electrical components. In view of the shortcomings of existing impeller injection molds in the demolding process, such as low efficiency and easy damage to the product, the development of an impeller injection mold that can achieve fast and stable demolding has become a technical problem that needs to be solved by those skilled in the art.

[0075] Specifically, the working principle of this easy-to-demold impeller injection mold is as follows: In the initial state, the moving mold core 200 is in a low position, and the push rod 310 connected to its bottom is in the inclined groove 301 of the splicing template 300. At this time, multiple splicing templates 300 retract relative to each other on the assembly plate 130 and fit together. The abutment block 510 is inserted into the outer positioning groove 304 at the bottom of the splicing template 300. The locking components work simultaneously to stably lock the splicing templates 300, ensuring that adjacent splicing templates 300 fit tightly together, and the injection groove 301 on its surface... 2 and injection mold 303 cooperate to form a complete impeller injection cavity for impeller product injection molding; at the same time, the linear pushing mechanism of the moving mold core 200 is driven to move, causing the moving mold core 200 and the upper mold 400 installed through the middle of its surface to move down synchronously. The protrusion 410 at the bottom of the upper mold 400 moves accordingly and seals the end face of the impeller injection cavity. At the same time, the lower mold 420 in the upper seat 110 moves up to fit against the bottom surface of the impeller injection cavity to achieve bottom sealing. The end of the ejector pin 421 on the surface of the lower mold 420 passes through the protrusion 410. In the through hole of plate 410, the impeller injection cavity 300a is ultimately formed by the impeller injection cavity, the protruding plate 410, the lower mold 420, and the ejector rod 421. During the injection molding operation, the injection material is transported to the feeding channel of the upper mold 400. The material is smoothly injected into the injection cavity 300a through the feeding channel. After the material is formed into an impeller product in the injection cavity 300a, the linear push mechanism drives the moving mold core 200 to move the upper mold 400 upwards synchronously. During the upward movement of the moving mold core 200, the ejector rod 310 slides along the inclined groove 301. The linear displacement of push rod 310 is converted into a force that pushes the splicing template 300 to move linearly outward on the assembly plate 130, causing multiple splicing templates 300 to unfold relative to each other. During this process, the abutment block 510 is dislodged from the outer positioning groove 304 and finally inserted into the inner positioning groove 304. The locking component releases the locking of the splicing template 300, and then drives the connecting rod 422 in the lower mold 420, which in turn drives the lower mold 420 and the ejector rod 421 to move upward together, ejecting the molded impeller product from the injection molding related structure, thus completing the entire injection molding and demolding operation.

[0076] It should be noted that the electronic components and models used in this invention can be selected according to actual needs, and the power supply and principle of the electronic components used in this solution are clear to those skilled in the art, and will not be described in detail here.

[0077] The above are merely embodiments of this application and are not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application. It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0078] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An impeller injection mold that facilitates demolding, characterized in that, It includes a fixed mold core formed by a base (100) and an upper seat (110) and a movable mold core (200) capable of linear displacement. Multiple splicing templates (300) are symmetrically arranged in a ring above the upper seat (110). The splicing templates (300) are driven to linear displacement by push rods (310) that penetrate their inner surfaces. The splicing template (300) has injection groove one (302) and injection groove two (303) on both sides for injection molding of impeller blades, and the injection groove one (302) and injection groove two (303) in the two splicing templates (300) that fit together form an impeller injection cavity. An upper mold (400) is installed through the center of the surface of the moving mold core (200). A protruding plate (410) is integrally formed at the bottom of the upper mold (400). The protruding plate (410) is used to seal the end face of the impeller injection cavity. A lower mold (420) capable of linear displacement is installed through the inner surface of the upper seat (110). The lower mold (420) is used to seal the bottom surface of the impeller injection cavity. A push rod (421) is installed through the center of the surface of the lower mold (420). The impeller injection cavity, together with the protruding plate (410), the lower mold (420), and the push rod (421), forms a closed injection cavity (300a). The injection cavity (300a) is used for injection molding of impeller products. The upper seat (110) has an installation groove at its end, and an assembly plate (130) is installed in the middle of the inner cavity of the installation groove. Multiple splicing templates (300) are slidably disposed on the outer surface of the assembly plate (130), and a limiting seat (120) is provided between two splicing templates (300) to limit their movement. A baffle (500) is provided on one side of the bottom of the splicing template (300), and the splicing template (300) slides in contact with the baffle (500). A connecting column (520) is provided through the surface of the baffle (500), and an abutment block (510) is connected to the top of the connecting column (520). A positioning groove (304) is provided at the bottom of the splicing template (300), and the positioning groove (304) and the abutment block (510) are used in conjunction. A locking component is provided below the connecting column (520), and the abutment block (510) cooperates with the locking component to lock the splicing template (300) for the tight splicing of multiple splicing templates (300).

2. The impeller injection mold for easy demolding according to claim 1, characterized in that, The locking assembly includes a mounting plate (600) disposed below the connecting post (520), and a plurality of outer retaining cylinders (630) are arranged in a ring at the end of the mounting plate (600), and a spring (650) is disposed inside the outer retaining cylinder (630), wherein the top of the spring (650) is connected to the bottom of the connecting post (520).

3. The impeller injection mold for easy demolding according to claim 2, characterized in that, The inner cavity of the outer fixed cylinder (630) and the bottom of the spring (650) are provided with a sliding seal base plate (640). The inner cavity of the outer fixed cylinder (630) and the upper and lower ends of the spring (650) are integrally formed with ring plate one (631) and ring plate two (632).

4. The impeller injection mold for easy demolding according to claim 3, characterized in that, An annular air tube (610) is embedded in the bottom of the mounting plate (600), and the input end of the annular air tube (610) is connected to a connecting air tube (611). Meanwhile, the surface of the annular air tube (610) is connected to multiple sets of guide air tubes (612), and the surface of the guide air tubes (612) penetrates the mounting plate (600) and is connected to a nozzle (620).

5. The impeller injection mold for easy demolding according to claim 1, characterized in that, The locking assembly includes a second mounting plate (700) disposed below the connecting post (520). The outer surface of the second mounting plate (700) is arranged in a ring array with multiple sets of rotating cylinders (710). The top of the rotating cylinder (710) is connected to a turntable (720), and the inner ring of the turntable (720) is slidably connected to a support plate (730).

6. The impeller injection mold for easy demolding according to claim 5, characterized in that, The bottom of the support plate (730) is movably connected to a spring (750) via a connecting plate. The outer surface of the support plate (730) is connected to a positioning post (740), and a limiting groove (722) is formed through the surface of the turntable (720) on one side of the positioning post (740).

7. The impeller injection mold for easy demolding according to claim 6, characterized in that, A through groove (721) is provided on the surface of the turntable (720) and on one side of the limiting groove (722). A rotating disk (770) is rotatably provided on the inner ring of the top of the second mounting disk (700), and a connecting plate (711) is sleeved on the bottom of the outer surface of the rotating cylinder (710). An electric push rod (780) is movably connected to the top side of the second mounting disk (700) through a rotating shaft, and multiple sets of push plates (771) are movably connected to the top of the rotating disk (770) through a rotating shaft.

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