Non-slitter-edge forming die for carbon fiber propeller

Abstract

The utility model provides a carbon fiber propeller slitter-edge-free forming die which comprises an upper die and a lower die, a protruding block protruding downwards is arranged on the bottom face of the upper die, and the lower end face of the protruding block is provided with a first paddle core face corresponding to a propeller. The top surface of the lower die is provided with a downward concave groove, and the bottom surface of the groove is provided with a second paddle core surface corresponding to the propeller; the first paddle core surface and the second paddle core surface are used for molding the propeller; and when the upper die and the lower die are in a die assembly state, the convex blocks correspondingly extend into the grooves. According to the non-slitter-edge forming mold for the carbon fiber propeller, the convex blocks are designed to be matched with the groove structures, the mold design mode that mold cavities are directly formed in the bottom face of the upper mold and the top face of the lower mold is changed, and the situation that in the mold closing, heating and curing process, a large amount of carbon fibers and epoxy resin overflow to the exterior of the mold cavities, and propeller slitter edges are formed is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a propeller production equipment, specifically to a carbon fiber propeller no waste edge forming die. BACKGROUND

[0002] In recent years, due to the advantages of flexible, quick response, unmanned flight, low operation requirements and so on, unmanned aerial vehicles gradually begin to be applied in military, transportation, aerial photography and other fields. Propeller is an important part of the unmanned aerial vehicle power system. In order to meet the requirements of high strength and light weight of unmanned aerial vehicle, most of the propellers of unmanned aerial vehicle adopt carbon fiber and epoxy resin as main raw materials. In the preparation process of carbon fiber propeller, carbon fiber and epoxy resin are usually made into carbon fiber prepreg first, and then the carbon fiber prepreg is placed in the propeller mold. After the mold is closed, heating is carried out. However, the molds for producing carbon fiber propellers on the market at present (for example: the mold for prefabricating holes of carbon fiber fixed-wing propeller disclosed in Chinese patent CN217495255U) mostly include an upper mold and a lower mold. The bottom surface of the upper mold is provided with an upper mold cavity, and the top surface of the lower mold is provided with a lower mold cavity. The upper mold cavity and the lower mold cavity together form a forming mold cavity of the propeller. The edge of the lower mold cavity and the top surface of the lower mold are smoothly connected, and the edge of the upper mold cavity and the bottom surface of the upper mold are smoothly connected. After the mold is closed, carbon fiber and epoxy resin are easy to overflow from the edge of the mold cavity, so that a large amount of waste edge is generated at the edge of the propeller after heating and curing, and cutting and cleaning are required.

[0003] In order to solve the above problems, people have been seeking an ideal technical solution. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at the deficiency of prior art, and provides a carbon fiber propeller no waste edge forming die.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A carbon fiber propeller no waste edge forming die, comprising an upper mold and a lower mold, the bottom surface of the upper mold is provided with a protruding block protruding downward, the lower end surface of the protruding block is provided with a first blade core surface corresponding to the propeller; the top surface of the lower mold is provided with a groove recessed downward, and the bottom surface of the groove is provided with a second blade core surface corresponding to the propeller; the first blade core surface and the second blade core surface are used for propeller molding; in the closed state of the upper mold and the lower mold, the protruding block corresponds to the inside of the groove.

[0007] The lower mold is provided with two rows of threaded holes, and the two rows of threaded holes are respectively located on the two sides of the groove; the upper mold is provided with a fixed through hole corresponding to the threaded hole; the fixed through hole and the threaded hole are connected through a fixing screw.

[0008] The middle part of the lower mold groove is provided with an ejection through hole; an ejection ejector pin slider is arranged in the ejection through hole, the ejection ejector pin slider comprises an ejection block and a sliding block, the outer diameter of the sliding block is less than or equal to the ejection through hole, and the outer diameter of the ejection block is greater than the ejection through hole; the sliding block extends out of the lower mold through the ejection through hole and is in sliding fit with the ejection through hole, and the ejection block is located in the interior of the groove of the lower mold.

[0009] The ejection block is in a cylindrical shape as a whole, the middle part of the groove is provided with a cylindrical groove corresponding to the ejection block, and a plurality of forming columns are arranged on the end face of the ejection block away from the sliding block, and the forming columns are used for forming a connecting hole in the middle part of the propeller.

[0010] The area of the horizontal section of the convex block decreases with the increase of the distance from the upper mold, and a gap is left between the side surface of the convex block and the side surface of the groove to form a glue overflow channel in the closed mold state of the upper mold and the lower mold.

[0011] The glue overflow channel is less than or equal to 0.1 mm.

[0012] Compared with the prior art, the utility model has the beneficial effects that the utility model provides a kind of carbon fiber propeller waste edge forming die without waste edge, which is designed by matching convex block and groove structure, changes the mold design method of setting mold cavity directly on the bottom surface of upper mold and top surface of lower mold, avoids the curing process of closed mold heating, and carbon fiber and epoxy resin overflow a lot to the outside of mold cavity to form propeller waste edge.In addition, the ejection ejector pin slider is arranged in the lower mold, which not only facilitates the ejection of the propeller after opening the mold, but also directly forms the propeller with connecting hole during the molding process, without subsequent punching;At the same time, when the upper mold and the lower mold are closed, a glue overflow channel with a width of not more than 0.1 mm is left, which facilitates the overflow of epoxy resin while avoiding the overflow of carbon fiber with epoxy resin, and the glue overflow channel with a width of not more than 0.1 mm, even if it forms a waste edge, the thickness of the waste edge is not more than 0.1 mm, which can be easily removed by simple tearing and pulling, and the cleaning difficulty is low. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a structure schematic diagram of the closed mold state of the utility model.

[0014] Figure 2 It is a structure schematic diagram of the upper mold in the utility model.

[0015] Figure 3 It is a structure schematic diagram of the lower mold in the utility model.

[0016] Figure 4 It is a structure schematic diagram of the ejection ejector pin slider in the utility model.

[0017] Figure 5 It is a cross-sectional structure schematic diagram of the closed mold state of the utility model.

[0018] In the diagram: 1. Upper mold; 2. Lower mold; 3. Fixed through hole; 4. Protrusion; 5. First paddle-shaped core surface; 6. Threaded hole; 7. Groove; 8. Second paddle-shaped core surface; 9. Ejection through hole; 10. Cylindrical groove; 11. Mold opening ejector pin slider; 12. Sliding block; 13. Ejector block; 14. Molding pillar; 15. Glue overflow channel. Detailed Implementation

[0019] The technical solution of this utility model will be further described in detail below through specific embodiments.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. "Installed," "equipped with," and "connected" can employ conventional means in the prior art, such as integral installation, snap-fit ​​installation, welding connection, adhesive connection, bolted connection, etc. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances and select suitable connection, setting, or installation methods from the existing technology.

[0021] like Figures 1-5 As shown, a waste-free molding die for a carbon fiber propeller includes an upper die 1 and a lower die 2. The bottom surface of the upper die 1 has a downwardly protruding protrusion 4, the lower end of which corresponds to a first blade-shaped core surface 5 on the propeller. The top surface of the lower die 2 has a downwardly recessed groove 7, the bottom surface of which corresponds to a second blade-shaped core surface 8 on the propeller. The first blade-shaped core surface 5 and the second blade-shaped core surface 8 are used for propeller molding. When the upper die 1 and lower die 2 are closed, the protrusion 4 extends into the groove 7, and the first blade-shaped core surface 5 and the second blade-shaped core surface form the mold cavity of the carbon fiber propeller. It should be noted that "waste-free" in this invention does not mean absolutely no waste, but rather that compared to existing carbon fiber propeller molds (e.g., Chinese Patent CN217495255 U), it does not produce large pieces of waste requiring subsequent cutting.

[0022] This carbon fiber propeller edge-free molding die, through the design of a combination of protrusions and grooves, changes the mold design method of directly setting the mold cavity on the bottom surface of the upper mold and the top surface of the lower mold. This avoids the large amount of carbon fiber and epoxy resin overflowing to the outside of the mold cavity during the mold closing heating and curing process, thus forming propeller edge waste.

[0023] In one of the embodiments, the lower die 2 is provided with two rows of threaded holes 6, and the two rows of threaded holes 6 are respectively located at two sides of the groove 7; the upper die 1 is provided with a fixed through hole 3 corresponding to the threaded hole 6; the fixed through hole 3 and the threaded hole 6 are connected by a fixing screw; in the use process, the fixed through hole 3 and the threaded hole 6 are connected by the fixing screw, so that the upper die and the lower die are clamped.

[0024] In one of the embodiments, the middle part of the groove 7 of the lower die 2 is provided with an ejection through hole 9; an ejection pin sliding block 11 is arranged in the ejection through hole 9, the ejection pin sliding block 11 comprises an ejection block 13 and a sliding block 12, the outer diameter of the sliding block 12 is less than or equal to the ejection through hole 9, and the outer diameter of the ejection block 13 is greater than the ejection through hole 9; the sliding block 12 extends out of the lower die 2 through the ejection through hole 9 and is in sliding fit with the ejection through hole 9, and the ejection block 13 is located in the groove 7 of the lower die 2. The ejection pin sliding block arranged in the lower die not only facilitates the ejection of the propeller after the mold is opened.

[0025] In one of the embodiments, the ejection block 13 is in a cylindrical shape as a whole, the middle part of the groove 7 is provided with a cylindrical groove 10 corresponding to the ejection block 13, and the end face of the ejection block 13 away from the sliding block 12 is provided with a plurality of shaped columns 14, which are used to form a connecting hole in the middle part of the propeller, so that the propeller with the connecting hole is directly formed in the molding process, and subsequent punching is not needed.

[0026] In one of the embodiments, the area of the horizontal cross section of the convex block 4 decreases with the increase of the distance from the upper die 1, that is, the side surface of the convex block is in a state of inward convergence, and the side surface of the convex block 4 and the side surface of the groove 7 leave a gap to form a glue overflow channel 15 in the clamped state of the upper die 1 and the lower die 2.

[0027] In one of the embodiments, the glue overflow channel 15 is less than or equal to 0.1 mm. When the upper die and the lower die are clamped, a glue overflow channel with a size of not more than 0.1 mm is left, which facilitates the overflow of the epoxy resin and avoids the large flow of the carbon fiber with the epoxy resin, and the waste edge formed by the glue overflow channel with a size of not more than 0.1 mm can be easily removed by simple tearing and pulling, and the cleaning difficulty is low.

[0028] The above embodiments can be combined with each other.

[0029] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the specific embodiments of the present application can still be modified or some technical features can be replaced by equivalent ones; without departing from the spirit of the technical solutions of the present application, all of them should be covered in the technical solution range of the present application claimed.

Claims

1. A carbon fiber propeller no-scrim forming mold comprising an upper mold and a lower mold, characterized by: The bottom surface of the upper die is provided with a protrusion protruding downward, and the lower end surface of the protrusion is provided with a first propeller blade core surface corresponding to the propeller; the top surface of the lower die is provided with a recess recessed downward, and the bottom surface of the recess is provided with a second propeller blade core surface corresponding to the propeller; the first propeller blade core surface and the second propeller blade core surface are used for propeller molding; in the closed state of the upper die and the lower die, the protrusion corresponds to extend into the inside of the recess.

2. The carbon fiber propeller waste edge free forming mold of claim 1, wherein: The lower die is provided with two rows of threaded holes, and the two rows of threaded holes are located on the two sides of the recess respectively; the upper die is provided with a fixed through hole corresponding to the threaded hole; the fixed through hole and the threaded hole are connected through a fixing screw.

3. The carbon fiber propeller waste edge free forming mold of claim 2, wherein: The middle part of the recess of the lower die is provided with an ejection through hole; an ejection pin slider is arranged in the ejection through hole, and the ejection pin slider comprises an ejection block and a sliding block; the outer diameter of the sliding block is less than or equal to the ejection through hole, and the outer diameter of the ejection block is greater than the ejection through hole; the sliding block passes through the ejection through hole and extends to the outside of the lower die and is in sliding fit with the ejection through hole, and the ejection block is located in the recess of the lower die.

4. The carbon fiber propeller waste edge free forming mold of claim 3, wherein: The ejection block is in the shape of a cylinder, the middle part of the recess is provided with a cylindrical groove corresponding to the ejection block, and the end surface of the ejection block away from the sliding block is provided with a plurality of forming columns, which are used for forming connecting holes in the middle part of the propeller.

5. The carbon fiber propeller waste edge free forming mold of claim 4, wherein: The area of the horizontal section of the protrusion decreases with the increase of the distance from the upper die, and in the closed state of the upper die and the lower die, a gap is left between the side surface of the protrusion and the side surface of the recess to form a glue overflow channel.

6. The carbon fiber propeller waste edge free forming mold of claim 5, wherein: The glue overflow channel is less than or equal to 0.1mm.

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