Fan blade mold

Abstract

The utility model relates to a fan blade mold which is applied to the field of molds and comprises an upper mold body and a lower mold body, an upper cavity matched with fan blades is formed in the face, facing the lower mold body, of the upper mold body, a lower cavity matched with the fan blades is formed in the face, facing the upper mold body, of the lower mold body, and the upper cavity and the lower cavity are connected to form a mold cavity. And a flash groove communicated with the lower cavity is formed in the lower die. The fan blade injection mold has the technical effects that air is extruded to discharge air in the mold cavity, bubbles generated after fan blades are formed are reduced, the fan blades are uniformly heated during cooling forming through the flash grooves, the possibility of generating weld marks is reduced, and the injection molding quality and efficiency of the fan blades are improved.

Description

Technical Field

[0001] The present application relates to the field of mold technology, and in particular to a fan blade mold. Background Art

[0002] The fan blades are components that are driven by a motor to rotate and generate wind. During the production process, the fan blades are generally molded by injecting plastic that has melted into a fluid at high temperature, i.e., injection molding liquid, through a mold.

[0003] During use of the existing mold, since the fan blades are narrow and long, the injection liquid that first flows into the mold is cooled and solidified due to the low initial temperature of the mold. The injection liquid flows meet and weld to form weld marks on the fan blades.

[0004] The weld mark affects the appearance of the fan blades and the fan blades are prone to breakage at the weld, resulting in poor rigidity of the fan blades and low injection molding efficiency. Summary of the invention

[0005] In order to help solve the problem that existing injection molds are prone to cause weld marks to form on fan blades, resulting in poor rigidity of the fan blades and low injection efficiency, the present application provides a fan blade mold, which adopts the following technical solution: it includes an upper mold and a lower mold, and the upper mold is provided with an upper cavity matching the fan blade on the surface facing the lower mold, and the lower mold is provided with a lower cavity matching the fan blade on the surface facing the upper mold, the upper cavity is connected to the lower cavity to form a mold cavity, and the lower mold is provided with an overflow groove communicating with the lower cavity.

[0006] Through the above technical scheme, the plastic melted into a fluid at high temperature, i.e., the injection molding liquid, is injected into the mold cavity. The material flow that first flows into the mold cavity flows in the mold cavity to squeeze the air while preheating the inner wall of the mold cavity. After the material flow that first flows into the mold cavity flows into the overflow trough along the lower cavity, the injection molding liquid is continuously injected to form the fan blades in one piece, and the air is squeezed out of the gas in the mold cavity, thereby reducing the generation of bubbles after the fan blades are formed. The overflow trough allows the fan blades to be evenly heated during cooling and forming, thereby reducing the possibility of weld marks and improving the quality and efficiency of the injection molding of the fan blades.

[0007] In a specific possible implementation mode, a guide groove communicating with the lower cavity is provided on the lower mold, and the overflow groove is communicated with the lower cavity through the guide groove.

[0008] Through the above technical solution, the guide groove guides the injection liquid, making it easier for the injection liquid to flow from the lower cavity into the overflow groove.

[0009] In a specific possible implementation manner, the groove walls of the overflow groove are all arc-shaped walls.

[0010] Through the above technical solution, the arc-shaped wall reduces the possibility of sharp angles appearing in the wall of the overflow groove, making it easier to demould and subsequently clean.

[0011] In a specific possible implementation manner, a collecting groove is provided at the bottom of the overflow groove.

[0012] Through the above technical solution, the material collecting trough plays the role of injection liquid, which increases the capacity space of the overflow trough, reduces the possibility of injection liquid overflowing the overflow trough, and improves the quality of fan blade injection molding.

[0013] In a specific possible implementation scheme, a guide plate is provided in the upper mold, a flow channel is opened in the guide plate, a feed pipe and a discharge pipe communicating with the flow channel are provided on the guide plate, and an output end of the discharge pipe is communicated with the cavity.

[0014] Through the above technical solution, the injection liquid flows from the feed pipe through the flow channel in the guide plate and then flows out of the discharge pipe and is injected into the mold cavity. The guide plate guides the injection liquid.

[0015] In a specific implementation manner, the number of the overflow troughs is set to four.

[0016] In a specific implementation scheme, the four overflow troughs are divided into two first troughs and two second troughs, the two first troughs are respectively located on both sides of the lower cavity close to the discharge pipe, and the two second troughs are located at one end of the lower cavity away from the discharge pipe.

[0017] Through the above technical scheme, the first material trough is set on both sides of the lower cavity close to the discharge pipe by utilizing the characteristics of the fan blade shape, and the second material trough is set at the end of the lower cavity away from the discharge pipe, so that the injection liquid can be evenly gathered into the overflow trough after being injected into the cavity.

[0018] In a specific possible implementation scheme, a driving electric cylinder corresponding to the discharge pipe is provided on the guide plate, and a needle valve for opening and closing the flow channel is provided at the output end of the driving electric cylinder.

[0019] Through the above technical solution, the driving electric cylinder is started to drive the needle valve to extend to block the flow channel corresponding to the discharge pipe in the guide plate. The needle valve is used to facilitate the control of the opening and closing of the flow channel, which is more flexible.

[0020] In a specific embodiment, a feeding funnel is provided at one end of the feeding tube away from the lower mold.

[0021] Through the above technical solution, the feeding funnel has a gathering effect on the injection liquid, thereby improving the efficiency of the injection liquid entering the feeding pipe.

[0022] In a specific possible implementation manner, a guide post is provided on the surface of the upper mold facing the lower mold, and a mounting groove matching the guide post is opened on the lower mold, and the guide post is inserted into the mounting groove.

[0023] Through the above technical solution, when the operator needs to lift the upper mold to take out the molded product, the guide column moves along the direction of the installation groove, and the installation groove limits the position of the guide column, thereby improving the stability when lifting the upper mold.

[0024] In summary, the present application has the following beneficial technical effects: the plastic melted into a fluid at high temperature, i.e., the injection molding liquid, is injected into the mold cavity; the material flow that first flows into the mold cavity flows in the mold cavity to squeeze the air while preheating the inner wall of the mold cavity; the material flow that first flows into the mold cavity flows into the overflow trough along with the lower cavity, and then the injection molding liquid is continued to be injected to form the fan blades in one piece, squeezing the air out of the mold cavity to discharge the gas in the mold cavity, thereby reducing the generation of bubbles after the fan blades are formed; the overflow trough allows the fan blades to be evenly heated during cooling and forming, thereby reducing the possibility of weld marks and improving the quality and efficiency of the injection molding of the fan blades. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0026] Figure 2 It is a schematic diagram of the structure of the guide plate used to illustrate the embodiment of the present application.

[0027] Figure 3 It is a schematic diagram of the structure of the needle valve in the embodiment of the present application.

[0028] Figure 4 It is a schematic diagram of the structure of the overflow chute in the embodiment of the present application.

[0029] Figure 5 yes Figure 4 A magnified schematic diagram of center A.

[0030] Figure numerals: 1. upper mold; 2. lower mold; 3. lower cavity; 4. overflow trough; 5. guide trough; 6. material collection trough; 7. guide plate; 8. mounting trough; 9. feed pipe; 10. discharge pipe; 11. first material trough; 12. second material trough; 13. driving electric cylinder; 14. needle valve; 15. feed funnel; 16. guide column. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-5 This application is described in further detail.

[0032] The embodiment of the present application discloses a fan blade mold.

[0033] Reference Figure 1 and Figure 2The fan blade mold includes an upper mold 1 and a lower mold 2. An upper cavity matching the size of the fan blade is opened on the surface of the upper mold 1 facing the lower mold 2, and a lower cavity 3 matching the size of the fan blade is opened on the surface of the lower mold 2 facing the upper mold 1. The upper cavity and the lower cavity 3 are connected to form a mold cavity, and the mold cavity is customized according to the shape of the fan blade.

[0034] Reference Figure 2 and Figure 3 , a guide plate 7 is arranged in the upper mold 1, a flow channel is opened in the guide plate 7, a feed pipe 9 and a discharge pipe 10 communicating with the flow channel are connected to the guide plate 7, the output end of the discharge pipe 10 is communicated with the cavity and is located directly above the lower cavity 3, the injection liquid flows from the feed pipe 9 into the cavity after flowing through the flow channel in the guide plate 7 and out of the discharge pipe 10, and the guide plate 7 guides the injection liquid. A driving electric cylinder 13 corresponding to the discharge pipe 10 is bolted to the guide plate 7, and a needle valve 14 for opening and closing the flow channel is arranged at the output end of the driving electric cylinder 13. Therefore, starting the driving electric cylinder 13 drives the needle valve 14 to extend and block the flow channel corresponding to the discharge pipe 10 in the guide plate 7, and the needle valve 14 is used to control the opening and closing of the flow channel, which is more flexible.

[0035] Reference Figure 2 and Figure 3 The end of the feed tube 9 facing away from the lower mold 2 is bolted with a feed funnel 15. The operator can easily and conveniently remove the feed funnel 15 from the upper mold 2 by disassembling the bolts. The feed funnel 15 has a convergence effect on the injection liquid, which improves the efficiency of the injection liquid entering the feed tube 9. A guide column 16 is fixedly connected to the surface of the upper mold 1 facing the lower mold 2. The lower mold 2 is provided with a mounting groove 8 that matches the size of the guide column 16, and the guide column 16 is inserted into the mounting groove 8. Therefore, when the operator needs to lift the upper mold 1 to take out the molded product, the guide column 16 moves along the direction of the mounting groove 8, and the mounting groove 8 limits the position of the guide column 16, which improves the stability when lifting the upper mold 1.

[0036] Reference Figure 4 and Figure 5 The lower mold 2 is provided with four overflow grooves 4 communicating with the lower cavity 3. The four overflow grooves 4 are divided into two first grooves 11 and two second grooves 12. The two first grooves 11 are respectively located on both sides of the lower cavity 3 close to the discharge pipe 10, and the two second grooves 12 are located at one end of the lower cavity 3 away from the discharge pipe 10. The first grooves 11 are arranged on both sides of the lower cavity 3 close to the discharge pipe 10 by utilizing the characteristics of the fan blade shape, and the second grooves 12 are arranged at one end of the lower cavity 3 away from the discharge pipe 10, so that the injection liquid can be evenly collected into the overflow grooves 4 after being injected into the cavity.

[0037] Reference Figure 4 and Figure 5The lower mold 2 is provided with a guide groove 5 communicating with the lower cavity 3, and the overflow groove 4 is connected with the lower cavity 3 through the guide groove 5. The guide groove 5 guides the injection liquid, which facilitates the injection liquid to flow from the lower cavity 3 into the overflow groove 4. At the same time, after the fan blade is injection molded, it is convenient to cut the overflow groove 4 from the position corresponding to the guide groove 5 of the product, thereby ensuring the quality of product molding. The depth of the guide groove 5 is less than the depth of the overflow groove 4 and the lower cavity 3, which reduces the possibility of the injection liquid flowing into the overflow groove 4 during product molding and improves the quality of product injection molding.

[0038] Reference Figure 4 and Figure 5 The walls of the overflow groove 4 are all arc-shaped walls, which reduce the possibility of sharp angles in the groove walls of the overflow groove 4, making it easier to demould and later clean. A collection groove 6 is provided at the bottom of the overflow groove 4, which plays the role of injection liquid, increases the capacity space of the overflow groove 4, reduces the possibility of injection liquid overflowing the overflow groove 4, and improves the quality of injection molding of the fan blade.

[0039] The implementation principle of the embodiment of the present application is: the operator injects the injection liquid from the feed funnel 15 into the feed pipe 9, and then the injection liquid flows out of the discharge pipe 10 through the flow channel in the guide plate 7 and is injected into the cavity. The material flow that first flows into the cavity flows in the cavity to squeeze the air while preheating the inner wall of the cavity. After the material flow that first flows into the cavity flows into the overflow trough 4 along the lower cavity 3, the injection liquid is continued to be injected to form the fan blades in one piece, and the air is squeezed to discharge the gas in the cavity, thereby reducing the generation of bubbles after the fan blades are formed. The overflow trough 4 allows the fan blades to be evenly heated during cooling and forming, reduces the possibility of weld marks, and improves the quality and efficiency of the injection molding of the fan blades.

[0040] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A fan blade mold, characterized in that: The invention comprises an upper mold (1) and a lower mold (2); an upper cavity matching the fan blade is provided on the surface of the upper mold (1) facing the lower mold (2); a lower cavity (3) matching the fan blade is provided on the surface of the lower mold (2) facing the upper mold (1); the upper cavity and the lower cavity (3) are connected to form a mold cavity; and an overflow groove (4) communicating with the lower cavity (3) is provided on the lower mold (2).

2. The fan blade mold according to claim 1, characterized in that: The lower mold (2) is provided with a guide groove (5) communicating with the lower cavity (3), and the overflow groove (4) is connected with the lower cavity (3) through the guide groove (5).

3. The fan blade mold according to claim 1, characterized in that: The groove walls of the overflow grooves (4) are all arc-shaped walls.

4. The fan blade mold according to claim 1, characterized in that: A material collecting trough (6) is provided at the bottom of the overflow trough (4).

5. The fan blade mold according to claim 1, characterized in that: The upper mold (1) is provided with a guide plate (7), a flow channel is provided in the guide plate (7), a feed pipe (9) and a discharge pipe (10) which are in communication with the flow channel are provided on the guide plate (7), and an output end of the discharge pipe (10) is in communication with the mold cavity.

6. The fan blade mold according to claim 5, characterized in that: The number of the overflow troughs (4) is set to four.

7. The fan blade mold according to claim 6, characterized in that: The four overflow troughs (4) are divided into two first troughs (11) and two second troughs (12); the two first troughs (11) are respectively located on both sides of the lower chamber (3) close to the discharge pipe (10), and the two second troughs (12) are located at one end of the lower chamber (3) away from the discharge pipe (10).

8. The fan blade mold according to claim 5, characterized in that: The guide plate (7) is provided with a driving electric cylinder (13) corresponding to the discharge pipe (10), and the output end of the driving electric cylinder (13) is provided with a needle valve (14) for opening and closing the flow channel.

9. The fan blade mold according to claim 5, characterized in that: A feeding funnel (15) is provided at one end of the feeding pipe (9) which is away from the lower mold (2).

10. The fan blade mold according to claim 1, characterized in that: A guide post (16) is provided on the surface of the upper mold (1) facing the lower mold (2), and a mounting groove (8) matching the guide post (16) is provided on the lower mold (2), and the guide post (16) is inserted into the mounting groove (8).

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