Injection mold for axial flow fan blade

Abstract

An injection mold for an axial flow fan blade includes a fixed mold assembly and a moving mold assembly. The fixed mold assembly includes a fixed mold mounting plate, a fixed template mounted on the fixed mold mounting plate, and multiple inserts. The top surface of the fixed template is a cavity forming surface. The cavity forming surface is provided with a hub forming groove, multiple first grooves, and multiple mounting grooves. The multiple first grooves are evenly distributed circumferentially, and the end of each first groove communicates with the hub forming groove. Each mounting groove is located between two first grooves. Each insert is detachably installed in a mounting groove, and the insert is provided with a second groove communicating with the first groove. One first groove and a corresponding second groove form a blade forming groove. The moving mold assembly includes a moving mold mounting plate and a moving template mounted on the bottom surface of the moving mold mounting plate. The bottom of the moving template is provided with a core forming surface. Compared with the prior art, the injection mold of this utility model can injection mold axial flow fan blades with different output air volumes simply by changing the inserts, resulting in low production costs.

Description

Technical Field

[0001] This utility model belongs to the field of injection mold technology, specifically relating to an injection mold for an axial flow fan blade. Background Technology

[0002] Axial flow fan blades are the core air supply components, and their output air volume needs to be differentiated according to motor power, duct structure, and operating conditions. Currently, the industry generally uses a one-piece injection molding process to manufacture axial flow fan blades. Changing the output air volume of a one-piece axial flow fan blade is achieved by adjusting the blade installation angle or changing the blade diameter. Adjusting the output air volume in this way requires a set of molds for each type of axial flow fan blade, resulting in high investment costs. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide an injection mold for an axial flow fan blade.

[0004] To achieve the above objectives, this utility model discloses an injection mold for an axial flow fan blade, comprising a fixed mold assembly and a moving mold assembly;

[0005] The fixed mold assembly includes a fixed mold mounting plate, a fixed template mounted on the fixed mold mounting plate, and multiple inserts;

[0006] The top surface of the fixed template is provided with a cavity forming surface; the cavity forming surface is provided with a hub forming groove, a plurality of first grooves and a plurality of mounting grooves; the plurality of first grooves are evenly distributed along the circumference, and the end of each first groove is connected to the hub forming groove; each mounting groove is located between two first grooves;

[0007] Each insert is detachably installed in a mounting slot, and the insert is provided with a second groove that communicates with the first groove. A first groove and a corresponding second groove form a blade forming groove.

[0008] The moving mold assembly includes a moving mold mounting plate and a moving template mounted on the bottom surface of the moving mold mounting plate. The bottom of the moving template is provided with a core forming surface. When the mold is closed, the core forming surface is sealed and pressed against the cavity forming surface and the top surface of the insert, and the hub forming groove and multiple blade forming grooves form a cavity.

[0009] In one embodiment, the insert is sealed and inserted into a corresponding mounting slot.

[0010] In another embodiment, the insert has a third groove on the side away from the corresponding first groove, and the two sides of the first groove extend to two adjacent mounting grooves. The first groove, together with the second groove of an adjacent insert and the third groove of another adjacent insert, form the blade forming groove.

[0011] In another embodiment, each blade forming groove is provided with multiple bosses near the hub forming groove, and the height of the bosses is lower than the height of the cavity.

[0012] In another embodiment, the boss is elongated and extends in the radial direction.

[0013] In another embodiment, each blade forming groove is provided with a first strip groove, the first strip groove extending in the radial direction, and one end of the first strip groove communicating with the hub forming groove.

[0014] In another embodiment, the first strip is located beside the plurality of bosses.

[0015] In another embodiment, each blade forming groove is provided with a second groove, the second groove being located at the end away from the hub forming groove and extending in the circumferential direction.

[0016] In another embodiment, there are multiple second strip-shaped grooves, which are spaced apart.

[0017] In another embodiment, the hub forming groove is located at the center of the top surface of the moving template.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] The blade forming groove is formed by a first groove and a corresponding second groove. The second groove is set on an insert that can be detachably installed in the mounting groove. When it is necessary to injection mold axial flow blades with different output air volumes, it is only necessary to replace the insert of the second groove with the corresponding area. In this way, the area of ​​the blade forming groove and the area of ​​the injection molded blade are changed, thereby injection molding an axial flow blade with the corresponding output air volume.

[0020] Axial fan blades with different output air volumes can be injection molded simply by changing the inserts, without having to replace the entire mold, resulting in lower production costs. Attached Figure Description

[0021] Figure 1 A three-dimensional structural schematic diagram of the injection mold for the axial flow fan blade in the embodiment;

[0022] Figure 2 A schematic diagram of the three-dimensional structure of the moving template;

[0023] Figure 3 A three-dimensional structural diagram of a template;

[0024] Figure 4 This is a top view of the fixed mold assembly;

[0025] Figure 5 for Figure 4 A three-dimensional structural diagram of the inlay;

[0026] Figure 6 for Figure 4 A schematic diagram of the structure of an axial flow fan blade obtained by injection molding a fixed mold component;

[0027] Figure 7 A top view of another fixed-mold component;

[0028] Figure 8 for Figure 7 A three-dimensional structural diagram of the inlay;

[0029] Figure 9 for Figure 7 A schematic diagram of the structure of an axial flow fan blade obtained by injection molding a fixed mold component;

[0030] Fixed mold assembly 100; fixed mold mounting plate 110; fixed template 120; cavity forming surface 130; hub forming groove 131; first groove 132; mounting groove 133; insert 140; second groove 141; third groove 142; blade forming groove 150; boss 151; first strip groove 152; second strip groove 153; lower ejector plate 160; upper ejector plate 170; mold foot 180;

[0031] Moving mold assembly 200; moving mold mounting plate 210; moving mold template 220; core forming surface 230;

[0032] Axial flow fan blade 300. Detailed Implementation

[0033] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] An injection mold for an axial flow fan blade, see [link / reference]. Figure 1 It includes a fixed mold assembly 100 and a moving mold assembly 200, wherein the moving mold assembly 200 moves toward the fixed mold assembly 100 to close the mold, thereby enabling injection molding.

[0035] Among them, see Figures 2-5The fixed mold assembly 100 includes a fixed mold mounting plate 110, a fixed mold template 120 mounted on the fixed mold mounting plate 110, and multiple inserts 140. The top surface of the fixed mold template 120 is provided with a cavity forming surface 130; the cavity forming surface 130 is provided with a hub forming groove 131, multiple first grooves 132, and multiple mounting grooves 133. The hub forming groove 131 is located at the center of the top surface of the moving mold template 220; the multiple first grooves 132 are evenly distributed circumferentially, specifically at equal intervals, and the end of each first groove 132 communicates with the hub forming groove 131; each mounting groove 133 is located between two first grooves 132, and each insert 140 is detachably installed in a mounting groove 133. The insert 140 is provided with a second groove 141 communicating with the first groove 132, and a first groove 132 and a corresponding second groove 141 form a blade forming groove 150. The moving mold assembly 200 includes a moving mold mounting plate 210 and a moving template 220 mounted on the bottom surface of the moving mold mounting plate 210. The bottom of the moving template 220 is provided with a core forming surface 230. When the mold is closed, the core forming surface 230 is sealed and pressed against the cavity forming surface 130 and the top surface of the insert 140, so that the hub forming groove 131 and the multiple blade forming grooves 150 form a cavity.

[0036] In this embodiment, the blade forming groove 150 of the injection mold is formed by a first groove 132 and a corresponding second groove 141. The second groove 141 is disposed on the insert 140 that is detachably mounted on the mounting groove 133. When it is necessary to injection mold axial flow blades with different output air volumes, such as reducing the output air volume, see [reference needed]. Figures 7-9 Only the insert 140 in the smaller second groove 141 needs to be replaced, such as... Figure 7 It can be seen that the area of ​​the second groove 141 on the top surface of the insert 140 is composed of... Figure 5 The entire groove becomes Figure 8 The localized grooves reduce the area of ​​the blade forming groove 150 and the area of ​​the injection-molded blade, thus allowing for the injection molding of a small-output axial flow fan blade. The injection-molded axial flow fan blade 300, for example... Figure 6 , Figure 9 As shown, axial fan blades with different output air volumes can be injection molded simply by changing insert 140, without needing to replace the entire mold, resulting in lower production costs.

[0037] It should be noted that the fixed mold assembly 100 also includes a lower ejector plate 160, an upper ejector plate 170, mold feet 180, a cooling system, and other structures. The moving mold assembly 200 is equipped with a runner, a cooling system, and other structures. These are existing structures and will not be described in detail here.

[0038] In this embodiment, the insert 140 is sealed and inserted into the corresponding mounting slot 133. This connection structure is simple and easy to replace.

[0039] To further improve the sealing performance of the insert 140, a sealing coating is provided on the outer wall of the insert 140 and the inner wall of the mounting groove 133.

[0040] In this embodiment, a third groove 142 is provided on the side of the insert 140 away from the corresponding first groove 132. The two sides of the first groove 132 extend to two adjacent mounting slots 133. The first groove 132, together with the second groove 141 of an adjacent insert 140 and the third groove 142 of another adjacent insert 140, form a blade forming groove 150. The second groove 141 and the third groove 142 of the adjacent inserts 140 form the two side boundaries of the blade forming groove 150. When it is necessary to adjust the bonding parameters on both sides of the blade, the inserts 140 on both sides can be replaced, which significantly improves the airflow adjustment resolution and mold adaptation flexibility.

[0041] In this embodiment, each blade forming groove 150 is provided with multiple bosses 151 near the hub forming groove 131, and the height of the bosses 151 is lower than the height of the cavity. The bosses 151 are provided to obstruct or guide the flow of molten material into the blade forming groove 150 during injection molding, thereby avoiding hollow defects caused by gas retention or insufficient pressure at the flow end; at the same time, it can also reduce the amount of molten material used and reduce costs.

[0042] Preferably, the boss 151 is elongated and extends in the radial direction, which can guide the molten material into the blade forming groove 150 and improve the uniformity of material filling during the forming process.

[0043] In this embodiment, each blade forming groove 150 is provided with a first strip groove 152, which extends radially and one end of the first strip groove 152 is connected to the hub forming groove 131. The first strip groove 152 forms a reinforcing rib on the blade surface, which improves the structural strength of the blade, especially at the connection between the blade and the hub.

[0044] Preferably, the first groove 152 is located on the side of the plurality of bosses 151.

[0045] In this embodiment, each blade forming groove 150 is provided with a second strip groove 153, which is located at the end away from the hub forming groove 131 and extends in the circumferential direction. The second strip groove also forms a reinforcing rib on the blade surface, which can improve the structural stability of the blade tip.

[0046] Preferably, there are multiple second-shaped grooves 153, specifically two, with the two second-shaped grooves 153 spaced apart.

[0047] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An injection mold for an axial flow fan blade, characterized in that: Includes fixed mold components and moving mold components; The fixed mold assembly includes a fixed mold mounting plate, a fixed template mounted on the fixed mold mounting plate, and multiple inserts; The top surface of the fixed template is provided with a cavity forming surface; the cavity forming surface is provided with a hub forming groove, a plurality of first grooves and a plurality of mounting grooves; the plurality of first grooves are evenly distributed along the circumference, and the end of each first groove is connected to the hub forming groove; each mounting groove is located between two first grooves; Each insert is detachably installed in a mounting slot, and the insert is provided with a second groove that communicates with the first groove. A first groove and a corresponding second groove form a blade forming groove. The moving mold assembly includes a moving mold mounting plate and a moving template mounted on the bottom surface of the moving mold mounting plate. The bottom of the moving template is provided with a core forming surface. When the mold is closed, the core forming surface is sealed and pressed against the cavity forming surface and the top surface of the insert, and the hub forming groove and multiple blade forming grooves form a cavity.

2. The injection mold for the axial flow fan blade according to claim 1, characterized in that: The insert is sealed and inserted into the corresponding mounting slot.

3. The injection mold for the axial flow fan blade according to claim 1, characterized in that: The insert has a third groove on the side away from the corresponding first groove. The two sides of the first groove extend to two adjacent mounting grooves. The first groove, together with the second groove of an adjacent insert and the third groove of another adjacent insert, form the blade forming groove.

4. The injection mold for the axial flow fan blade according to claim 1, characterized in that: Each blade forming groove is provided with multiple bosses near the hub forming groove, and the height of the bosses is lower than the height of the cavity.

5. The injection mold for the axial flow fan blade according to claim 4, characterized in that: The boss is elongated and extends radially.

6. The injection mold for the axial flow fan blade according to claim 4, characterized in that: Each blade forming groove is provided with a first strip groove, the first strip groove extends in the radial direction, and one end of the first strip groove is connected to the hub forming groove.

7. The injection mold for the axial flow fan blade according to claim 6, characterized in that: The first groove is located beside the plurality of bosses.

8. The injection mold for the axial flow fan blade according to claim 1, characterized in that: Each blade forming groove is provided with a second groove, which is located at the end away from the hub forming groove and extends in the circumferential direction.

9. The injection mold for the axial flow fan blade according to claim 8, characterized in that: There are multiple second-shaped grooves, which are spaced apart.

10. The injection mold for the axial flow fan blade according to claim 1, characterized in that: The hub forming groove is located at the center of the top surface of the moving template.

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