Blade forming mechanism in axial flow fan wind wheel injection mold

Abstract

The utility model provides a blade forming mechanism in an axial flow fan wind wheel injection mold, and belongs to the technical field of machinery. The problem that an existing mold is high in cost is solved. The blade forming die comprises a die holder and a plurality of strip-shaped forming blocks arranged on the upper side of the die holder, the forming blocks are annularly distributed, one end of each forming block is a forming end, a blade forming cavity is formed between every two adjacent forming ends, the other end of each forming block is connected with the die holder in a sliding mode, and a driven rack is horizontally fixed to the bottom of each forming block. The two sides of the width of each driven rack are each provided with a row of teeth, and every two adjacent driven racks are connected through a first gear transmission structure. A driving rack and a driving piece used for driving the driving rack to slide back and forth in the length direction of the driving rack are further horizontally arranged on the die holder, the two sides of the width of the driving rack are each provided with a row of teeth, and the driving rack is connected with one pair of adjacent driven racks through a second gear transmission structure. The utility model has low cost.

Description

Technical Field

[0001] The utility model belongs to the technical field of machinery and relates to an injection mould for an axial flow fan wheel, in particular to a blade forming mechanism in the injection mould for an axial flow fan wheel. Background Art

[0002] The wind wheel 18 is an important part of the axial flow fan, and its structure is as follows: Figure 1 As shown, it includes a base 18a and a circle of blades 18b.

[0003] At present, wind wheels made of plastic materials are generally formed by injection molding. The injection mold includes an upper mold, a lower mold, and a circle of molding blocks arranged between the upper and lower molds, and a blade molding cavity is formed between one end of two adjacent molding blocks. Among them, the other end of each molding block is connected to a hydraulic cylinder to make the two adjacent molding blocks move closer to each other or away from each other.

[0004] In the above-mentioned injection mold, each molding block is connected to a hydraulic cylinder, and a corresponding hydraulic system is also required in actual use, so the overall cost is relatively high. Utility Model Content

[0005] The utility model aims at the above problems existing in the prior art, and proposes a blade forming mechanism in an axial flow fan wind wheel injection mold, and solves the technical problem of how to reduce the cost.

[0006] The purpose of the utility model can be achieved through the following technical solutions: a blade molding mechanism in an axial flow fan impeller injection mold, comprising a mold base and a molding block horizontally arranged on the upper side of the mold base and in the shape of an elongated strip, wherein there are multiple molding blocks and are distributed in a circular ring shape, one end of the molding block is a molding end, and a blade molding cavity is formed between two adjacent molding ends, and the other end of the molding block is slidably connected to the mold base so that the molding block can slide along its own length direction, characterized in that a driven rack is horizontally fixed to the bottom of each molding block, the driven rack and the molding block have the same length extension direction, a row of teeth are provided on both sides of the width of the driven rack, and the two adjacent driven racks are connected by a first gear transmission structure; a driving rack and a driving member for driving the driving rack to slide back and forth along its own length direction are also horizontally provided on the mold base, a row of teeth are also provided on both sides of the width of the driving rack, and the driving rack is respectively connected to one pair of adjacent driven racks through a second gear transmission structure.

[0007] When in use, the driving member drives the driving rack to move, and under the cooperation of the first gear transmission structure, the second gear transmission structure and the driven rack, the movement of each molding block remains consistent, so that the adjacent molding ends are brought closer or farther away, and the mold opening and closing operations are realized.

[0008] The present application only needs to set up a driving component as a driving source, and cooperate with gears and racks to realize the synchronous movement of multiple molding blocks. In actual products, the cost of the driving source is much higher than the cost of gears and racks, which can effectively reduce the production cost of the entire injection mold.

[0009] In the blade forming mechanism in the above-mentioned axial flow fan wind wheel injection mold, the above-mentioned first gear transmission structure includes two rotating shafts 1 vertically rotatably arranged on the mold base and a row of driven gears 1 arranged between the two rotating shafts 1, and the two ends of the two rotating shafts 1 are respectively fixed with an upper gear 1 and a lower gear 1, and the two upper gears 1 are respectively meshed with the corresponding two driven racks; the number of driven gears 1 is an even number, and each driven gear 1 is rotatably arranged on the mold base through a vertically arranged shaft body 1, and the adjacent two driven gears 1 are meshed together, and the two driven gears 1 at the head and tail are respectively meshed with the two lower gears 1. The above-mentioned design has the advantages of simple structure and stable transmission.

[0010] In the blade forming mechanism in the above-mentioned axial flow fan impeller injection mold, a clearance hole 1 is vertically penetrated on the mold base, the number of the clearance holes 1 and the number of the rotating shafts 1 are the same, and each rotating shaft 1 is vertically arranged in the corresponding clearance hole 1, and the driven gear 1 is arranged on the lower side of the mold base.

[0011] In the blade forming mechanism in the above-mentioned axial flow fan impeller injection mold, the second gear transmission structure includes a vertically arranged rotating shaft 2 and a driving gear meshing with the driving rack, an upper gear 2 and a lower gear 2 are respectively fixed at both ends of the rotating shaft 2, the upper gear 2 meshes with the corresponding driven rack, the driving gear is rotatably set on the mold base through the transmission shaft, the upper end of the transmission shaft is fixedly connected to the large gear, the lower gear 2 meshes with the large gear through the driven gear 2, and the driven gear 2 is rotatably set on the mold base through the shaft body 2.

[0012] In the blade forming mechanism in the above-mentioned axial flow fan impeller injection mold, the driving rack is arranged at the lower side of the mold base, and two clearance holes 2 for respectively accommodating the two transmission shafts are vertically penetrated through the mold base.

[0013] The driven rack and the driving rack are distributed on the upper and lower sides of the mold base, and the transmission shaft and the rotating shaft are both arranged inside the mold base, making the entire molding mechanism compact, effectively reducing the height and reducing space occupancy.

[0014] In the blade molding mechanism in the above-mentioned axial flow fan impeller injection mold, each molding block is slidably connected to the mold base through a guide rail slider structure, which has the advantages of simple structure and stable operation.

[0015] In the blade forming mechanism in the above-mentioned axial flow fan impeller injection mold, the guide rail slider structure includes two linear guides and two sliders respectively installed on the two linear guides; the two linear guides are arranged in parallel along the width direction of the corresponding forming blocks, and the length of the linear guides extends along the length direction of the corresponding forming blocks. The two sliders are fixedly connected to the corresponding forming blocks to enhance the sliding stability and accuracy of the forming blocks and improve the quality and accuracy of blade forming.

[0016] In the blade molding mechanism in the above-mentioned axial flow fan impeller injection mold, the driven rack is arranged between the corresponding two linear guide rails.

[0017] In the blade forming mechanism in the above-mentioned injection mold for the axial flow fan rotor, the type of the driving member is a hydraulic cylinder, and the piston rod of the hydraulic cylinder is fixedly connected to the driving rack.

[0018] As another solution, in the blade molding mechanism in the above-mentioned axial flow fan impeller injection mold, the type of the driving member is an electric push rod, and the main shaft of the electric push rod is fixedly connected to the driving rack.

[0019] Compared with the prior art, the blade forming mechanism in the axial flow fan wind wheel injection mold has the following advantages:

[0020] 1. This application only needs to set up a driving component as a driving source, and cooperate with gears and racks to realize the synchronous movement of multiple molding blocks. In actual products, the cost of the driving source is much higher than the cost of gears and racks, which can effectively reduce the production cost of the entire injection mold.

[0021] 2. The driven rack and the driving rack are distributed on the upper and lower sides of the mold base, and the transmission shaft and the rotating shaft are both set inside the mold base, making the entire molding mechanism compact, effectively reducing the height and reducing space occupancy. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the wind wheel.

[0023] Figure 2 It is a structural schematic diagram of the blade forming mechanism.

[0024] Figure 3 yes Figure 2 Schematic diagram of the enlarged structure at point A in the middle.

[0025] Figure 4 Schematic diagram of the first gear transmission structure.

[0026] Figure 5 It is a schematic diagram of the connection between a driving rack and multiple driven racks.

[0027] In the figure, 1, mold base; 2, molding block; 2a, molding end; 3, blade molding cavity; 4, driven rack; 5, driving rack; 6, driven gear 1; 7, rotating shaft 1; 8, upper gear 1; 9, lower gear 1; 10, rotating shaft 2; 11, driving gear; 12, upper gear 2; 13, lower gear 2; 14, driven gear 2; 15, transmission shaft; 16, linear guide; 17, driving member; 18, wind wheel; 18a, base; 18b, blade. DETAILED DESCRIPTION

[0028] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments. Embodiment 1

[0029] like Figure 2 As shown, the blade molding mechanism in the injection mold of the axial flow fan impeller includes a mold base 1 and a long strip-shaped molding block 2 horizontally arranged on the upper side of the mold base 1. There are multiple molding blocks 2 distributed in a circular ring shape.

[0030] Specifically,

[0031] like Figures 2 to 5 As shown, one end of the forming block 2 is a forming end 2a, and a blade forming cavity 3 is formed between two adjacent forming ends 2a; the other end of the forming block 2 is slidably connected to the mold base 1 so that the forming block 2 can slide along its own length direction. A driven rack 4 is horizontally fixed to the bottom of each forming block 2, and the length extension direction of the driven rack 4 and the forming block 2 is consistent. A row of teeth is provided on both sides of the width of the driven rack 4, and the two adjacent driven racks 4 are connected by a first gear transmission structure. A driving rack 5 and a driving member 17 for driving the driving rack 5 to slide back and forth along its own length direction are horizontally provided on the mold base 1. A row of teeth is also provided on both sides of the width of the driving rack 5, and the driving rack 5 is respectively connected to one of the two adjacent driven racks 4 through a second gear transmission structure.

[0032] When in use, the driving member 17 drives the driving rack 5 to move, and under the cooperation of the first gear transmission structure, the second gear transmission structure and the driven rack 4, the movement of each molding block 2 remains consistent, so that the adjacent molding ends 2a move closer or farther away, realizing the opening and closing operations.

[0033] The present application only needs to set up a driving member 17 as a driving source, and cooperate with gears and racks to realize the synchronous movement of multiple molding blocks 2. In actual products, the cost of the driving source is much higher than the cost of gears and racks, which can effectively reduce the production cost of the entire injection mold.

[0034] In this embodiment,

[0035] like Figure 4 and Figure 5 As shown, the first gear transmission structure includes two rotating shafts 17 vertically rotatably arranged on the mold base 1 and a row of driven gears 16 arranged between the two rotating shafts 17. Among them, an upper gear 18 and a lower gear 19 are fixed to the two ends of the two rotating shafts 17, and the two upper gears 8 are respectively meshed with the corresponding two driven racks 4; the number of driven gears 6 is an even number, and each driven gear 6 is rotatably arranged on the mold base 1 through a vertically arranged shaft body 1, and the adjacent two driven gears 6 are meshed together, and the two driven gears 6 at the head and tail are respectively meshed with the two lower gears 19. The above design has the advantages of simple structure and stable transmission. Further explanation, the driven gear 6 is arranged on the lower side of the mold base 1; a clearance hole 1 is vertically penetrated on the mold base 1, and the number of the clearance hole 1 and the rotating shaft 17 is the same, and each rotating shaft 7 is vertically arranged in the corresponding clearance hole 1.

[0036] The second gear transmission structure includes a vertically arranged rotating shaft 10 and a driving gear 11 meshed with the driving rack 5, an upper gear 12 and a lower gear 13 are fixed at both ends of the rotating shaft 10, the upper gear 12 meshes with the corresponding driven rack 4, the driving gear 11 is rotatably arranged on the mold base 1 through a transmission shaft 15, the upper end of the transmission shaft 15 is fixedly connected to a large gear, the lower gear 13 meshes with the large gear through a driven gear 14, and the driven gear 14 is rotatably arranged on the mold base 1 through a shaft body 2. Further explanation, the driving rack 5 is arranged on the lower side of the mold base 1, and the mold base 1 is vertically penetrated with two clearance holes 2 for accommodating the two transmission shafts 15 respectively.

[0037] The driven rack 4 and the driving rack 5 are distributed on the upper and lower sides of the mold base 1, and the transmission shaft 15 and the rotating shaft 7 are both arranged inside the mold base 1, so that the entire molding mechanism becomes compact, effectively reduces the height and reduces the space occupied.

[0038] The sliding connection between the forming block 2 and the die base 1 is as follows: each forming block 2 is slidably connected to the die base 1 through a guide rail slider structure. Specifically, the guide rail slider structure includes two linear guides 16 and two sliders respectively installed on the two linear guides 16; the two linear guides 16 are arranged in parallel along the width direction of the corresponding forming block 2, and the length of the linear guide 16 extends along the length direction of the corresponding forming block 2. The two sliders are fixedly connected to the corresponding forming block 2 to enhance the sliding stability and accuracy of the forming block 2 and improve the quality and accuracy of blade forming. Further explanation, the driven rack 4 is arranged between the corresponding two linear guides 16.

[0039] The driving member 17 is a hydraulic cylinder, and the piston rod of the hydraulic cylinder is fixedly connected to the driving rack 5 . Embodiment 2

[0040] The structure and principle of the second embodiment are basically the same as those of the first embodiment, except that the driving member 17 is an electric push rod, and the main shaft of the electric push rod is fixedly connected to the driving rack 5 .

[0041] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A blade forming mechanism in an injection mold for an axial flow fan impeller, comprising a mold base (1) and a long strip-shaped forming block (2) horizontally arranged on the upper side of the mold base (1), wherein the forming blocks (2) are multiple and distributed in a circular ring shape, one end of the forming block (2) is a forming end (2a), and a blade forming cavity (3) is formed between two adjacent forming ends (2a), and the other end of the forming block (2) is slidably connected to the mold base (1) so that the forming block (2) can slide along its own length direction, characterized in that: A driven rack (4) is horizontally fixed at the bottom of each forming block (2); the driven rack (4) and the forming block (2) extend in the same length direction; a row of teeth is provided on both sides of the width of the driven rack (4); and two adjacent driven racks (4) are connected via a first gear transmission structure; a driving rack (5) and a driving member (17) for driving the driving rack (5) to slide back and forth along its length direction are also horizontally provided on the mold base (1); a row of teeth is also provided on both sides of the width of the driving rack (5); and the driving rack (5) is respectively connected to one of the two adjacent driven racks (4) via a second gear transmission structure.

2. The blade forming mechanism in the injection mold of the axial flow fan impeller according to claim 1 is characterized in that: The first gear transmission structure comprises two rotating shafts (7) vertically rotatably arranged on the mold base (1) and a row of driven gears (6) arranged between the two rotating shafts (7); an upper gear (8) and a lower gear (9) are respectively fixed at both ends of the two rotating shafts (7); the two upper gears (8) are respectively meshed with the corresponding two driven racks (4); the number of the driven gears (6) is an even number, each driven gear (6) is rotatably arranged on the mold base (1) through a vertically arranged shaft body (1); two adjacent driven gears (6) are meshed together, and the two driven gears (6) at the head and tail are respectively meshed with the two lower gears (9).

3. The blade forming mechanism in the injection mold of the axial flow fan wheel according to claim 2 is characterized in that: The mold base (1) is vertically penetrated by a clearance hole 1, the number of the clearance holes 1 and the number of the rotating shafts 1 (7) are the same, and each rotating shaft 1 (7) is vertically arranged in a corresponding clearance hole 1, and a driven gear 1 (6) is arranged on the lower side of the mold base (1).

4. The blade forming mechanism in the injection mold of the axial flow fan wheel according to claim 3 is characterized in that: The second gear transmission structure comprises a second vertically arranged rotating shaft (10) and a driving gear (11) meshing with the driving rack (5); an upper gear (12) and a lower gear (13) are respectively fixed to the two ends of the rotating shaft (10); the upper gear (12) meshes with the corresponding driven rack (4); the driving gear (11) is rotatably arranged on the mold base (1) via a transmission shaft (15); the upper end of the transmission shaft (15) is fixedly connected to a large gear; the lower gear (13) meshes with the large gear via a second driven gear (14); and the second driven gear (14) is rotatably arranged on the mold base (1) via a second shaft body.

5. The blade forming mechanism in the injection mold of the axial flow fan wheel according to claim 4, characterized in that: The driving rack (5) is arranged on the lower side of the mold base (1), and the mold base (1) is vertically penetrated by two clearance holes for respectively accommodating two transmission shafts (15).

6. The blade forming mechanism in the injection mold of the axial flow fan wheel according to claim 1, characterized in that: Each molding block (2) is slidably connected to the mold base (1) via a guide rail slider structure.

7. The blade forming mechanism in the injection mold of the axial flow fan wheel according to claim 6, characterized in that: The guide rail and slider structure comprises two linear guide rails (16) and two sliders respectively mounted on the two linear guide rails (16); the two linear guide rails (16) are arranged in parallel along the width direction of the corresponding forming block (2), and the length of the linear guide rails (16) extends along the length direction of the corresponding forming block (2); the two sliders are fixedly connected to the corresponding forming block (2).

8. The blade forming mechanism in the injection mold of the axial flow fan wheel according to claim 7, characterized in that: The driven rack (4) is arranged between the corresponding two linear guide rails (16).

9. The blade forming mechanism in the injection mold of the axial flow fan wheel according to claim 1, characterized in that: The type of the driving member (17) is a hydraulic cylinder, and the piston rod of the hydraulic cylinder is fixedly connected to the driving rack (5).

10. The blade forming mechanism in the injection mold of the axial flow fan wheel according to claim 1, characterized in that: The type of the driving member (17) is an electric push rod, and the main shaft of the electric push rod is fixedly connected to the driving rack (5).

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