Plastic-coated metal fan blade and production method thereof

Abstract

The invention discloses a plastic-coated metal fan blade and a production method thereof, and relates to the technical field of fan blades. Comprising a shaft seat and fan blade bodies, the shaft seat comprises a hub, a shaft sleeve and connecting sleeves, the shaft sleeve is fixedly installed at the position, close to the middle, in the hub, the three connecting sleeves are evenly arranged on the outer surface of the hub in the circumferential direction, and the fan blade bodies are fixedly installed in the connecting sleeves; the fan blade body comprises blades, connecting plates and a rectangular opening, and the connecting plates are fixedly installed at the positions, close to the connecting sleeve, of the side faces of the blades. The shaft seat and the fan blade body are integrated through injection molding in an injection molding mode, connection between the shaft seat and the fan blade body is firmer, breaking and damage are not prone to occurring, the assembling process is omitted, work efficiency is greatly improved, production cost is reduced, meanwhile, the shaft seat has good insulation performance, electric leakage of a motor is effectively avoided, the weight of the fan blade is reduced, and energy consumption is reduced. The metal blades improve the strength, the blades are not prone to deformation, and a uniform and stable wind source can be generated.

Description

Technical Field

[0001] The invention relates to the technical field of fan blades, and in particular to a plastic-coated metal fan blade and a production method thereof. Background Art

[0002] The fan blades are the components of table fans and ceiling fans. They are driven by the motor and rotate to generate wind. The width and angle of the fan blades are designed and depend on the load power of the motor. If you ignore the motor power and only look at the speed, you should also look at the angle of the fan blades. If the angles of the fan blades are the same, of course the wider the blades, the stronger the wind. Moreover, the design and production of the fan blades are in a regular symmetrical structure, so that a uniform and stable wind source can be generated.

[0003] In the prior art, conventional fan blades are mostly formed by all-metal welding or all-plastic injection molding. The welding process of all-metal fan blades is time-consuming and labor-intensive, and the precision is poor. During use, they are heavy, consume a lot of kinetic energy, and have poor insulation performance, which cannot effectively prevent motor leakage, posing a safety hazard. All-plastic injection molded fan blades have unstable rigidity and low strength. During long-term use, the fan blades are easily deformed and damaged, and the deformation of the fan blades leads to low wind. Traditional metal blades and plastic shaft seats can also be fixed and connected by locking bolts, which will consume a lot of time for assembly during the production process. In addition, the fan blade assembly has low precision, the blade rotation is unstable, the production efficiency is low, and the production cost is high. At the same time, the installation is not firm, and the blades are prone to loosening after long-term use, causing problems such as breaking or falling, posing a safety hazard. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a plastic-clad metal fan blade and a production method thereof to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a plastic-clad metal fan blade, comprising a shaft seat and a fan blade body, the shaft seat comprising a hub, a shaft sleeve and a connecting sleeve, a shaft sleeve is fixedly installed near the middle position in the hub, and the upper and lower sides of the shaft sleeve are open structures, three connecting sleeves are evenly arranged on the outer surface of the hub along the circumferential direction, and the fan blade body is fixedly installed in the connecting sleeve; the fan blade body comprises a blade, a connecting plate and a rectangular opening, a connecting plate is fixedly installed on the side of the blade near the connecting sleeve, and the connecting plate is fixedly installed in the connecting sleeve, three rectangular openings are evenly opened on the connecting plate and in the connecting sleeve, the upper surface of the blade is provided with a concave groove, and the lower surface of the blade corresponding to the concave groove is formed with a guide protrusion

[0006] To further optimize the technical solution, a reinforcing rib is fixedly installed in a rectangular shape between the inner wall of the hub and the outer surface of the sleeve.

[0007] To further optimize the technical solution, a limiting groove is provided on the lower surface of the sleeve.

[0008] To further optimize the technical solution, the wheel hub, shaft sleeve, connecting sleeve and reinforcing ribs are an integrally-molded structure formed by injection molding.

[0009] To further optimize the technical solution, the blades and the connecting plate are an integrally formed structure.

[0010] To further optimize the technical solution, the upper and lower side surfaces of the blade are both curved structures.

[0011] A method for producing a plastic-coated metal fan blade comprises the following steps:

[0012] S1. Making the main body of the fan blade: Select the metal raw materials used for the main body of the fan blade, press the metal into the required shape, use a stamping machine mold to put the metal into the mold, press the metal into the required shape through high pressure, and then use a grinding and polishing machine to grind and polish the main body of the fan blade, and clean it;

[0013] S2. Mold pretreatment: Clean, preheat and apply mold release agent to the mold surface of the injection mold. Clean the mold surface of the injection mold with a cleaning brush, clean and preheat the injection mold with hot air, and then apply mold release agent with a brush.

[0014] S3, placing the fan blade body: placing the three manufactured fan blade bodies in the cavity of the injection mold as required;

[0015] S4, mold closing and injection molding: the injection mold is closed, and the raw material in the injection molding machine is injected into the mold cavity of the injection mold through the injection port, so that the injected raw material forms a shaft seat, and the injection-molded shaft seat and the fan blade body are injection-molded into a whole. The temperature during injection molding is 200 degrees, and the injection molding time is 30 seconds;

[0016] S5, cooling, molding and demoulding: after the injection mold is ventilated and cooled, the air outlet of the injection mold is opened, the injection mold is opened, and during the mold opening process, high-pressure air is input into the mold through the injection port of the mold until demoulding is completed to obtain a completed fan blade;

[0017] S6. Surface treatment: Clean the burrs on the shaft seat after injection molding, and spray the fan blade body and the shaft seat through a nozzle to obtain a complete fan blade.

[0018] Beneficial Effects

[0019] Compared with the prior art, the present invention provides a plastic-clad metal fan blade and a production method thereof, which has the following beneficial effects:

[0020] The plastic-coated metal fan blade and its production method, by setting the shaft seat as an injection-molded integrated structure, and the shaft seat is injection-molded into a whole with the fan blade body during the injection molding process, the connection between the two is more firm, not easy to break and damage, eliminating the assembly process, greatly improving work efficiency, reducing production costs, and at the same time the shaft seat has good insulation performance, effectively avoiding motor leakage, and reducing the overall weight of the fan blade, that is, reducing energy consumption, the metal blade has high strength, the blade is not easy to deform during use, the blade can generate a uniform and stable wind source, and at the same time the concave grooves and guide protrusions on the upper and lower sides of the blade make the wind speed higher and less likely to generate noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the main structure of a plastic-clad metal fan blade proposed by the present invention;

[0022] Figure 2 This is a front exploded view of a plastic-clad metal fan blade proposed by the present invention;

[0023] Figure 3 A bottom view of a plastic-clad metal fan blade proposed by the present invention;

[0024] Figure 4 This is an exploded bottom view of a plastic-clad metal fan blade proposed by the present invention;

[0025] Figure 5 The present invention is a schematic flow chart of a method for producing a plastic-coated metal fan blade.

[0026] In the figure: 1, shaft seat; 101, wheel hub; 102, shaft sleeve; 103, connecting sleeve; 2, fan blade body; 201, blade; 202, connecting plate; 203, rectangular opening; 3, concave groove; 4, guide protrusion; 5, reinforcing rib; 6, limiting groove. DETAILED DESCRIPTION

[0027] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Please refer to Figure 1-Figure 5The present invention discloses a plastic-coated metal fan blade, comprising a shaft seat 1 and a fan blade body 2, wherein the shaft seat 1 comprises a hub 101, a shaft sleeve 102 and a connecting sleeve 103, wherein the hub 101 is fixedly installed with the shaft sleeve 102 near the middle, and the upper and lower sides of the shaft sleeve 102 are open structures, and the outer surface of the hub 101 is evenly provided with three connecting sleeves 103 along the circumferential direction, and the fan blade body 2 is fixedly installed in each of the connecting sleeves 103;

[0029] The fan blade body 2 includes a blade 201, a connecting plate 202 and a rectangular opening 203. The connecting plate 202 is fixedly installed on the side of the blade 201 near the connecting sleeve 103, and the connecting plate 202 is fixedly installed in the connecting sleeve 103. Three rectangular openings 203 are evenly opened on the connecting plate 202 and in the connecting sleeve 103. The upper surface of the blade 201 is provided with a concave groove 3, and the lower surface of the blade 201 corresponding to the concave groove 3 is formed with a guide protrusion 4.

[0030] Specifically, a reinforcing rib 5 is fixedly installed between the inner wall of the hub 101 and the outer surface of the sleeve 102 in a rectangular shape.

[0031] In this embodiment, the reinforcing ribs 5 make the connection between the hub 101 and the sleeve 102 stronger, and the sleeve 102 is strong and not easily damaged.

[0032] Specifically, a limiting groove 6 is provided on the lower surface of the shaft sleeve 102 .

[0033] In this embodiment, the limiting groove 6 is limited by the limiting rod on the motor output shaft after the shaft sleeve 102 is installed, so that the shaft sleeve 102 is firmly installed and will not rotate on the motor output shaft.

[0034] Specifically, the wheel hub 101, the shaft sleeve 102, the connecting sleeve 103 and the reinforcing rib 5 are an integrally-molded structure.

[0035] In this embodiment, the shaft seat 1 formed by the wheel hub 101, the shaft sleeve 102, the connecting sleeve 103 and the reinforcing ribs 5 has a high structural strength, is not easily deformed or damaged, and has a long service life.

[0036] Specifically, the blade 201 and the connecting plate 202 are an integrally formed structure.

[0037] In this embodiment, the fan blade body 2 composed of the blades 201 and the connecting plate 202 is strong and not easily deformed or damaged, which is conducive to long-term use.

[0038] Specifically, the upper and lower side surfaces of the blade 201 are both cambered structures.

[0039] In this embodiment, the blades 201 can generate a wind source more stably.

[0040] A method for producing a plastic-coated metal fan blade comprises the following steps:

[0041] S1. Making the fan blade body: Select the metal raw material used for the fan blade body 2, press the metal into the required shape, use a stamping machine mold to put the metal into the mold, press the metal into the required shape by high pressure, and then grind and polish the fan blade body 2 by a grinding and polishing machine, and clean it;

[0042] S2. Mold pretreatment: Clean, preheat and apply mold release agent to the mold surface of the injection mold. Clean the mold surface of the injection mold with a cleaning brush, clean and preheat the injection mold with hot air, and then apply mold release agent with a brush.

[0043] S3, placing the fan blade body: placing the three manufactured fan blade bodies 2 in the cavity of the injection mold as required;

[0044] S4, mold closing and injection molding: the injection mold is closed, and the raw material in the injection molding machine is injected into the cavity of the injection mold through the injection port, so that the injected raw material forms a shaft seat 1, and the injection-molded shaft seat 1 and the fan blade body 2 are injection-molded into a whole, the temperature during injection molding is 200 degrees, and the injection molding time is 30 seconds;

[0045] S5, cooling, molding and demoulding: after the injection mold is ventilated and cooled, the air outlet of the injection mold is opened, the injection mold is opened, and during the mold opening process, high-pressure air is input into the mold through the injection port of the mold until demoulding is completed to obtain a completed fan blade;

[0046] S6. Surface treatment: clean the burrs on the shaft seat 1 after injection molding, and spray the fan blade body 2 and the shaft seat 1 through a nozzle to obtain a complete fan blade.

[0047] Working principle: The metal raw material is made into the shape of the fan blade body 2 by stamping, the outer surface of the fan blade body 2 is cleaned, and then the injection mold is cleaned and preheated, and the three fan blade bodies 2 are evenly placed in the cavity of the injection mold group along the circumference, and the injection mold is closed, and the plastic is injected into the cavity of the injection mold through the injection port. The injected plastic forms the structure of the shaft seat 1 in the cavity, and the connecting sleeve 103 in the shaft seat 1 is sleeved on the connecting plate 202 on the fan blade body 2. At the same time, three rectangular openings 203 are opened on the connecting plate 202, so that the connecting sleeve 103 formed by injection molding is injected into the rectangular openings 203 and connected, so that the connection between the connecting sleeve 103 and the connecting plate 202 is more firmly connected, and then the injection mold is cooled, and the injection mold is opened. At the same time, the ejector pushes the fan blade body 2 upwards to The fan blades are taken out after being formed, and the injection-molded shaft seat 1 is deburred. The outer surfaces of the fan blade body 2 and the shaft seat 1 are sprayed as needed. The shaft seat 1 is an integral injection molding structure, and the shaft seat 1 is injection-molded into a whole with the fan blade body 2 during the injection molding process. The connection between the two is more firm and not easy to break or damage, eliminating the assembly process, greatly improving work efficiency, and reducing production costs. At the same time, the shaft seat 1 has good insulation performance, which effectively avoids motor leakage and reduces the overall weight of the fan blade, that is, reduces energy consumption. The metal blade 201 is strong and is not easy to deform during use. The blade 201 can generate a uniform and stable wind source. At the same time, the concave grooves 3 and the guide protrusions 4 on the upper and lower sides of the blade 201 make the wind speed greater and are not easy to generate noise.

[0048] The beneficial effects of the present invention are as follows: the shaft seat 1 and the fan blade body 2 are injection molded into one piece by injection molding, the connection between the two is more firm, not easy to break or damage, the assembly process is omitted, the work efficiency is greatly improved, and the production cost is reduced. At the same time, the shaft seat 1 has good insulation performance, which effectively avoids motor leakage and reduces the weight of the fan blade, that is, reduces energy consumption. The metal blades 201 have improved strength, the blades 201 are not easy to deform, and can produce a uniform and stable wind source.

[0049] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A plastic-clad metal fan blade, comprising a shaft seat (1) and a fan blade body (2), characterized in that: The shaft seat (1) comprises a wheel hub (101), a shaft sleeve (102) and a connecting sleeve (103); the shaft sleeve (102) is fixedly installed near the middle of the wheel hub (101), and the upper and lower side surfaces of the shaft sleeve (102) are open structures; three connecting sleeves (103) are evenly arranged on the outer surface of the wheel hub (101) along the circumferential direction, and the fan blade body (2) is fixedly installed in each of the connecting sleeves (103); The fan blade body (2) comprises a blade (201), a connecting plate (202) and a rectangular opening (203); a connecting plate (202) is fixedly installed at a position close to the connecting sleeve (103) on the side of the blade (201), and the connecting plate (202) is fixedly installed in the connecting sleeve (103); three rectangular openings (203) are evenly arranged on the connecting plate (202) and in positions in the connecting sleeve (103); a concave groove (3) is arranged on the upper surface of the blade (201); and a flow guide protrusion (4) is formed on the lower surface of the blade (201) corresponding to the concave groove (3).

2. A plastic-clad metal fan blade according to claim 1, characterized in that: A reinforcing rib (5) is fixedly installed in a rectangular shape between the inner wall of the wheel hub (101) and the outer surface of the shaft sleeve (102).

3. The plastic-clad metal fan blade according to claim 1, characterized in that: A limiting groove (6) is provided on the lower surface of the shaft sleeve (102).

4. The plastic-clad metal fan blade according to claim 1, characterized in that: The wheel hub (101), the shaft sleeve (102), the connecting sleeve (103) and the reinforcing rib (5) are an integrally-molded structure formed by injection molding.

5. The plastic-clad metal fan blade according to claim 1, characterized in that: The blade (201) and the connecting plate (202) are an integrally formed structure.

6. The plastic-clad metal fan blade according to claim 1, characterized in that: The upper and lower side surfaces of the blade (201) are both cambered structures.

7. A method for producing a plastic-clad metal fan blade, the method being based on the use of a plastic-clad metal fan blade as claimed in any one of claims 1 to 6, characterized in that: The following steps are involved: S1. Making the fan blade body: Select the metal raw material used for the fan blade body (2), press the metal into a desired shape, use a stamping machine mold to put the metal into the mold, press the metal into the desired shape by high pressure, and then grind and polish the fan blade body (2) by a grinding and polishing machine, and clean it; S2. Mold pretreatment: Clean, preheat and apply mold release agent to the mold surface of the injection mold. Clean the mold surface of the injection mold with a cleaning brush, clean and preheat the injection mold with hot air, and then apply mold release agent with a brush. S3, placing the fan blade body: placing the three manufactured fan blade bodies (2) in the cavity of the injection mold as required; S4, mold closing and injection molding: the injection mold is closed, and the raw material in the injection molding machine is injected into the mold cavity of the injection mold through the injection port, so that the injected raw material forms a shaft seat (1), and the injection-molded shaft seat (1) and the fan blade body (2) are injection-molded to form a whole, the temperature during injection molding is 200 degrees, and the injection molding time is 30 seconds; S5, cooling, molding and demoulding: after the injection mold is ventilated and cooled, the air outlet of the injection mold is opened, the injection mold is opened, and during the mold opening process, high-pressure air is input into the mold through the injection port of the mold until demoulding is completed to obtain a completed fan blade; S6. Surface treatment: The burrs on the shaft seat (1) after injection molding are cleaned, and spraying is performed on the fan blade body (2) and the shaft seat (1) through a nozzle to obtain a complete fan blade.

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