Injection mold for integral forming of cross-flow wind wheel

Abstract

The utility model discloses an injection mold for integral forming of a cross-flow wind wheel, which relates to the production field of the cross-flow wind wheel, and comprises a fixed mold, a movable mold and an ejection mechanism, the fixed mold is provided with a fixed mold core, the fixed mold is provided with an injection port, the injection port is communicated with a splitter plate, an outlet of the splitter plate is provided with a needle valve, the fixed mold is provided with an electromagnetic valve and a control cylinder, and the control cylinder is provided with a control valve. The needle valve is connected to the output end of the control cylinder, and the electromagnetic valve is electrically connected to the control cylinder; the movable mold is provided with a movable mold core, a cavity is formed by the fixed mold core and the movable mold core, and an outlet of the splitter plate is communicated with the cavity; the ejection mechanism comprises an ejection hole, a lower panel, an upper panel, an ejection needle, a needle return column and a needle return spring, a bottom plate is further arranged on the side, away from the movable mold, of the lower panel, the ejection hole is formed in the bottom plate, the ejection needle is arranged on the upper panel and extends into the mold cavity, the needle return column is arranged between the upper panel and the movable mold, and the needle return spring is arranged on the needle return column. The smooth degree of the injection mold in the mold opening and part taking process can be improved.

Description

Technical Field

[0001] This utility model relates to the field of cross-flow wind turbine manufacturing, and in particular to an injection mold for integral molding of cross-flow wind turbines. Background Technology

[0002] The cross-flow impeller is made of multiple intermediate sections welded together using ultrasonic welding. Each intermediate section is formed by injection molding a single ring-shaped disc and multiple blades. The principle of injection molding is to inject molten plastic raw material into the mold cavity under high pressure using an injection molding machine, and then obtain the molded product after cooling and solidification.

[0003] The injection mold is installed on the injection molding machine. The nozzle of the mold is aligned with the nozzle of the injection machine. The heated and melted plastic granules are injected into the cavity of the injection mold through the nozzle. The cooling system drives the plastic granules to cool and solidify in the cavity, forming the workpiece of the cross-flow fan.

[0004] However, in existing molds, when it is necessary to demold the workpiece, jamming can easily occur during the mold opening and part removal process, which affects production efficiency. Utility Model Content

[0005] In order to improve the smoothness of the injection mold during the mold opening and part removal process, this application provides an injection mold for the one-piece molding of a cross-flow fan wheel.

[0006] The injection mold for integral molding of cross-flow wind turbines provided in this application adopts the following technical solution:

[0007] An injection mold for integral molding of a cross-flow fan impeller, comprising:

[0008] A fixed mold is provided, which is equipped with a fixed mold core and has an injection port. The injection port is connected to a flow divider plate, and a needle valve is provided at the outlet of the flow divider plate. The fixed mold is equipped with a solenoid valve and a control cylinder. The needle valve is connected to the output end of the control cylinder, and the solenoid valve is electrically connected to the control cylinder.

[0009] A moving mold, wherein a moving mold core is mounted on the moving mold core, and the fixed mold core and the moving mold core form a cavity, and the outlet of the flow divider plate is connected to the cavity;

[0010] An ejection mechanism is provided, comprising an ejection hole, a lower panel, an upper panel, an ejection pin, a return pin post, and a return pin spring. The upper panel and the lower panel are both located on the side of the moving mold away from the fixed mold. The side of the lower panel away from the moving mold is also provided with a base plate. The ejection hole is opened in the base plate. The ejection pin is disposed on the upper panel and extends into the cavity. The return pin post is disposed between the upper panel and the moving mold. The return pin spring is disposed on the return pin post.

[0011] By adopting the above technical solution, molten plastic raw material enters the mold cavity through the injection port and manifold. By setting a needle valve, in conjunction with a solenoid valve and control cylinder, the timing and amount of plastic flowing into the mold cavity can be precisely controlled, avoiding material waste and molding defects. The plastic raw material solidifies within the mold cavity, forming a cross-flow impeller. The ejection mechanism effectively and smoothly pushes the finished product out of the cavity, and the ejection mechanism is reset by a return pin post and return pin spring. This improves the smoothness of the injection mold during mold opening and part removal, reducing part jamming and product damage.

[0012] Optionally, the fixed mold includes a fixed plate, a water-transporting plate, and an mounting plate connected in sequence, the injection port is opened on the fixed plate, the control cylinder is mounted on the fixed plate, the flow divider is disposed on the water-transporting plate, and the fixed mold core is mounted on the mounting plate.

[0013] By adopting the above technical solution, plastic raw materials can enter the mold cavity more accurately, which improves the stability and precision of the injection process and helps to improve the molding quality.

[0014] Optionally, the moving mold includes a mounting plate and a connecting plate connected to each other, the moving mold core is mounted on the mounting plate, and the return pin post is disposed between the upper panel and the connecting plate.

[0015] By adopting the above technical solutions, the overall rigidity and stability of the moving mold are improved. The setting of the return pin column enables the ejection force to be transmitted evenly, avoiding deviation or jamming when ejecting the workpiece.

[0016] Optionally, the mounting plate is provided with a guide ring, the guide ring has a sliding groove, the mounting plate is provided with a guide post, the guide post is inserted into the sliding groove and slidably connected to the guide ring, and the water-carrying plate has an insertion port for inserting the guide post.

[0017] By adopting the above technical solutions, the design of the guide ring and guide post enables the moving mold to be positioned more accurately during mold opening and closing, avoiding product defects caused by misalignment.

[0018] Optionally, the fixing plate is connected to an auxiliary rod, which is inserted into the mounting plate and connected to a limiting block. The limiting block has a groove. The bottom plate is connected to a positioning rod, which is inserted into the mounting plate and connected to a pressure block. The pressure block has a protrusion that cooperates with the groove.

[0019] By adopting the above technical solution, the cooperation between the limiting block on the mounting plate and the pressure block on the placement plate can effectively prevent misalignment of the moving mold and the fixed mold during the opening and closing process, ensuring precise alignment of the mold.

[0020] Optionally, lower mold bases are provided at both ends between the mounting plate and the base plate, and the upper panel and the lower panel are located between the two lower mold bases.

[0021] By adopting the above technical solution, the setting of the lower mold base can effectively enhance the overall stability of the mold.

[0022] Optionally, the fixed mold core has a first inclined surface at one end near the moving mold core, and the moving mold core has a second inclined surface at one end near the fixed mold core, with the first inclined surface and the second inclined surface abutting against each other.

[0023] By adopting the above technical solution, the positioning error of the fixed mold and the moving mold when they are close together is reduced through the contact and cooperation of the first inclined surface and the second inclined surface, the accuracy of the mold is improved, and the rotational runout of the cross-flow fan is reduced.

[0024] Optionally, a hot runner junction box and a solenoid valve junction box are also installed on the side of the fixed mold.

[0025] By adopting the above technical solutions, the hot runner junction box can ensure the stable operation of the hot runner system, and the installation of the solenoid valve junction box makes the control of the solenoid valve more convenient and reliable, which helps to achieve precise opening and closing of the needle valve.

[0026] Optionally, two of each of the fixed mold core and the moving mold core are provided and evenly distributed on the mounting plate and the placement plate, and the two outlets of the flow divider plate are respectively connected to the two cavities.

[0027] By adopting the above technical solution, it is possible to simultaneously inject two cross-flow impellers into the injection mold, thereby improving production efficiency.

[0028] In summary, this application has at least one of the following beneficial effects:

[0029] 1. Molten plastic raw material enters the mold cavity through the injection port and manifold. By using a needle valve, in conjunction with a solenoid valve and a control cylinder, the timing and amount of plastic flowing into the mold cavity can be precisely controlled, avoiding material waste and molding defects. The plastic raw material solidifies within the mold cavity, forming a cross-flow impeller. The ejection mechanism effectively and smoothly pushes the finished product out of the cavity, and the return pin and return pin spring achieve the reset of the ejection mechanism. This improves the smoothness of the injection mold during mold opening and part removal, reducing part jamming and product damage.

[0030] 2. The design of the guide ring and guide post enables the moving mold to be positioned more accurately during mold opening and closing. The cooperation between the limit block on the mounting plate and the positioning rod and pressure block on the base plate can effectively prevent the moving mold and the fixed mold from misaligning during opening and closing. Attached Figure Description

[0031] Figure 1This is a schematic diagram of the overall structure of the injection mold according to an embodiment of this application;

[0032] Figure 2 This is a cross-sectional schematic diagram of the injection mold according to an embodiment of this application;

[0033] Figure 3 This is a cross-sectional schematic diagram of the connection between the moving mold and the fixed mold in an embodiment of this application.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1. Fixed mold; 11. Fixing plate; 111. Injection port; 112. Control cylinder; 12. Water channel plate; 121. Diverter plate; 13. Mounting plate; 131. Guide ring; 132. Limiting block; 133. Auxiliary rod; 14. Solenoid valve; 15. Solenoid valve junction box; 16. Hot runner junction box; 2. Moving mold; 21. Mounting plate; 211. Guide pillar; 212. Positioning rod; 213. Pressure block; 22. Connecting plate; 3. Ejection mechanism; 31. Base plate; 311. Ejection hole; 32. Lower panel; 33. Upper panel; 34. Ejector pin; 35. Return pin post; 36. Return pin spring; 37. Lower mold base; 4. Fixed mold core; 41. Moving mold core; 42. First inclined surface; 43. Second inclined surface. Detailed Implementation

[0036] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0037] This application discloses an injection mold for integral molding of a cross-flow fan impeller. (Refer to...) Figure 1 An injection mold for integral molding of a cross-flow fan wheel includes a fixed mold 1, a moving mold 2, and an ejection mechanism 3. The fixed mold 1 includes a fixed plate 11, a water-carrying plate 12, and a mounting plate 13 connected in sequence. The moving mold 2 includes a placement plate 21 and a connecting plate 22. The ejection mechanism 3 includes a base plate 31, a lower panel 32, and an upper panel 33. Lower mold bases 37 are also provided on both sides between the connecting plate 22 and the base plate 31. The upper panel 33 and the lower panel 32 are located between the two lower mold bases 37.

[0038] Reference Figure 2The fixed plate 11 has an injection port 111 for molten plastic granules to enter. Drive cylinders are also provided at both ends of the injection port 111. The water-carrying plate 12 is equipped with a flow divider 121, which connects to two outlets. A needle valve is installed at each outlet of the flow divider 121, and the needle valve is connected to the output end of the drive cylinder. A fixed mold core 4 is mounted on the mounting plate 13, and a moving mold core 41 is mounted on the placement plate 21. A cavity is formed between the fixed mold core 4 and the moving mold core 41. Two fixed mold cores 4 and two moving mold cores 41 are evenly distributed on the mounting plate 13 and placement plate 21, respectively, resulting in two cavities. The two outlets of the flow divider 121 are connected to the corresponding cavities. This dual-cavity design allows for the simultaneous molding of two cross-flow impellers in a single injection molding process, significantly improving production efficiency.

[0039] When the fixed mold 1 and the moving mold 2 are closed, molten plastic granules are injected into the injection port 111 through the nozzle. The plastic granules flow into the manifold 121, and the drive cylinder drives the needle valve to open, allowing the plastic granules to flow into the mold cavity. Pressure is applied by the injection molding machine, causing the plastic granules to fill the entire cavity. A hot runner junction box 16 is provided on the side of the fixed mold 1 to simplify the wiring layout. A solenoid valve 14 and a solenoid valve junction box 15 are also provided on the side of the fixed mold 1. The solenoid valve 14 is electrically connected to the control cylinder 112, and controls the opening and closing of the needle valve through the solenoid valve 14, thereby controlling the injection quantity and injection time.

[0040] After the plastic granules are injected into the mold cavity, the cooling system rapidly cools the mold using cooling water or oil. The purpose of cooling is to quickly solidify the plastic from a molten state to maintain the desired shape and size. Once cooled, the plastic granules form a cross-flow fan, at which point the mold needs to be opened to remove the workpiece.

[0041] Reference Figure 2 The fixed mold core 4 has a first inclined surface 42 at the end near the moving mold core 41, and the moving mold core 41 has a second inclined surface 43 at the end near the fixed mold core 4. The first inclined surface 42 and the second inclined surface 43 abut against each other. When the fixed mold and the moving mold are close to each other, the fixed mold core 4 and the moving mold core 41 are close together. At this time, the first inclined surface 42 and the second inclined surface 43 abut against each other, ensuring accurate positioning of the front mold core and the moving mold core 41, reducing positioning errors, and reducing the rotational runout of the cross-flow impeller.

[0042] Reference Figure 3Guide rings 131 are provided at each of the four corners of the mounting plate 13 near the mounting plate 21. Each guide ring 131 has a sliding groove. An auxiliary rod 133 is connected to the fixing plate 11. The auxiliary rod 133 passes through the water-carrying plate 12 and the mounting plate 13 sequentially and is connected to a limiting block 132. The limiting block 132 is located within the mounting plate 13 and has a groove. Correspondingly, guide posts 211 are provided at each of the four corners of the mounting plate 21 near the mounting plate 13. A positioning rod 212 is connected to the bottom plate 31. The positioning rod 212 passes through the lower mold base 37, the connecting plate 22, and the mounting plate 21 sequentially and is connected to a pressure block 213. The pressure block 213 is located within the mounting plate 21 and has a protruding strip. The guide posts 211 can slide along the guide rings 131 while being inserted into the sliding grooves. The water-carrying plate 12 has an insertion port for the guide posts 211.

[0043] When the moving mold 2 and the fixed mold 1 separate, the moving mold 2 moves. At this time, the guide post 211 slides along the guide ring 131 in the sliding groove and the insertion port to ensure that the sliding direction of the moving mold 2 does not deviate. The pressure block 213 and the limiting block 132 are arranged opposite to each other. When the fixed mold 1 and the moving mold 2 contact and close, the protrusion is inserted into the groove. The setting of the pressure block 213 and the limiting block 132 is used to assist the movement and positioning of the guide post 211 to ensure the accuracy of the mold closing between the moving mold 2 and the fixed mold 1.

[0044] Reference Figure 1 and Figure 2 The ejection mechanism 3 is used to push the product out of the cavity after injection molding. The ejection mechanism 3 also includes an ejection hole 311, an ejection pin 34, a return pin post 35, and a return pin spring 36. The upper panel 33 and lower panel 32 are both located on the side of the connecting plate 22 away from the mounting plate 21, with the upper panel 33 positioned between the lower panel 32 and the connecting plate 22. The ejection hole 311 is located on the base plate 31. The ejection pin 34 is mounted on the upper panel 33 and extends into the cavity. The return pin post 35 is located between the upper panel 33 and the connecting plate 22, and the return pin spring 36 is located on the return pin post 35. During demolding, the moving mold 2 and the fixed mold 1 separate. The ejector pin of the injection molding machine pushes the lower panel 32 and the upper panel 33 to move through the ejection hole 311. At this time, the ejection pin 34 moves and ejects the workpiece formed in the cavity, thus removing the formed workpiece, i.e., the cross-flow impeller, from the moving mold 2. At this time, the return spring 36 is in a compressed state. When the external force is removed from the ejector rod, the upper panel 33 moves away from the connecting plate 22 under the elastic force of the return spring 36, and at the same time, the ejector pin 34 retracts from the cavity to achieve reset.

[0045] The implementation principle of an injection mold for integral molding of a cross-flow fan wheel according to an embodiment of this application is as follows: molten plastic particles are injected into the injection port 111 through the nozzle, the plastic particles flow into the flow divider plate 121, and the plastic particles flow into the cavity and cool and solidify into a workpiece by opening the needle valve.

[0046] During mold opening, the external drive unit drives the moving mold 2 to move. The guide post 211 slides along the guide ring 131 in the sliding groove and insertion port, causing the moving mold 2 and the fixed mold 1 to separate. The ejector pin of the injection molding machine pushes the lower panel 32 and the upper panel 33 to move through the ejection hole 311. At this time, the ejector pin 34 moves and ejects the workpiece formed in the cavity, thereby allowing the cross-flow fan to be removed. When the external force is removed, the ejector pin 34 retracts under the elastic force of the return pin spring 36, realizing the reset of the lower panel 32 and the upper panel 33.

[0047] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this specific embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. An injection mold for integral molding of a cross-flow fan impeller, characterized in that, include: A fixed mold (1) is provided with a fixed mold core (4). The fixed mold (1) has an injection port (111) which is connected to a flow divider plate (121). A needle valve is provided at the outlet of the flow divider plate (121). The fixed mold (1) is equipped with a solenoid valve (14) and a control cylinder (112). The needle valve is connected to the output end of the control cylinder (112). The solenoid valve (14) is electrically connected to the control cylinder (112). The moving mold (2) is equipped with a moving mold core (41), the fixed mold core (4) and the moving mold core (41) form a cavity, and the outlet of the flow divider plate (121) is connected to the cavity; Ejection mechanism (3), the ejection mechanism (3) includes ejection hole (311), lower panel (32), upper panel (33), ejection pin (34), return pin column (35) and return pin spring (36). The upper panel (33) and the lower panel (32) are both located on the side of the moving mold (2) away from the fixed mold (1). The side of the lower panel (32) away from the moving mold (2) is also provided with a base plate (31). The ejection hole (311) is opened on the base plate (31). The ejection pin (34) is set on the upper panel (33) and extends into the cavity. The return pin column (35) is set between the upper panel (33) and the moving mold (2). The return pin spring (36) is set on the return pin column (35).

2. The injection mold for integral molding of a cross-flow fan impeller according to claim 1, characterized in that: The fixed mold (1) includes a fixed plate (11), a water-transporting plate (12), and an mounting plate (13) connected in sequence. The injection port (111) is opened on the fixed plate (11), the control cylinder (112) is mounted on the fixed plate (11), the diverter plate (121) is disposed on the water-transporting plate (12), and the fixed mold core (4) is mounted on the mounting plate (13).

3. The injection mold for integral molding of a cross-flow fan impeller according to claim 2, characterized in that: The moving mold (2) includes a mounting plate (21) and a connecting plate (22) connected to each other. The moving mold core (41) is installed on the mounting plate (21), and the return pin column (35) is disposed between the upper panel (33) and the connecting plate (22).

4. The injection mold for integral molding of a cross-flow fan impeller according to claim 3, characterized in that: The mounting plate (13) is provided with a guide ring (131), the guide ring (131) has a sliding groove, the mounting plate (21) is provided with a guide post (211), the guide post (211) is inserted into the sliding groove and slidably connected to the guide ring (131), and the water transport plate (12) has an insertion port for the guide post (211) to be inserted.

5. The injection mold for integral molding of a cross-flow fan impeller according to claim 3, characterized in that: The fixing plate (11) is connected to an auxiliary rod (133), which is inserted into the mounting plate (13) and connected to a limiting block (132). The limiting block (132) has a groove. The bottom plate (31) is connected to a positioning rod (212), which is inserted into the mounting plate (21) and connected to a pressure block (213). The pressure block (213) has a protrusion that cooperates with the groove.

6. The injection mold for integral molding of a cross-flow fan impeller according to claim 3, characterized in that: Lower mold bases (37) are provided at both ends between the connecting plate (22) and the base plate (31), and the upper panel (33) and the lower panel (32) are located between the two lower mold bases (37).

7. The injection mold for integral molding of a cross-flow fan impeller according to claim 1, characterized in that: The fixed mold core (4) has a first inclined surface (42) at one end near the moving mold core (41), and the moving mold core (41) has a second inclined surface (43) at one end near the fixed mold core (4). The first inclined surface (42) and the second inclined surface (43) abut against each other.

8. The injection mold for integral molding of a cross-flow fan impeller according to claim 1, characterized in that: The side of the fixed mold (1) is also equipped with a hot runner junction box (16) and a solenoid valve junction box (15).

9. The injection mold for integral molding of a cross-flow fan impeller according to claim 3, characterized in that: Two of each of the fixed mold core (4) and the moving mold core (41) are provided and are evenly distributed on the mounting plate (13) and the placement plate (21). The two outlets of the diversion plate (121) are respectively connected to the two cavities.

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