Forming die for folding propeller made of carbon fiber composite material

Abstract

The utility model belongs to the technical field of unmanned aerial vehicle propeller manufacturing equipment, and particularly relates to a carbon fiber composite material folding propeller forming mold which is characterized in that an upper mold and a lower mold are detachably connected, and mold lifting grooves are formed in the upper mold and the lower mold; an upper section mold cavity is formed in the upper mold, a lower section mold cavity is formed in the lower mold, a glue flowing groove matched with the lower section mold cavity is formed in the lower mold, a reserved mold taking hole is formed in the lower mold, and a movable pin shaft is arranged in the reserved mold taking hole; the upper mold and the lower mold are matched to form a joint line, the edge height of the mold cavity of the lower mold is not higher than that of the joint line, a glue overflowing seam is generated, and the glue overflowing seam is communicated with the interior of the glue flowing groove, the interior of the upper section mold cavity and the interior of the lower section mold cavity.

Description

Technical Field

[0001] The utility model belongs to the technical field of unmanned aerial vehicle propeller manufacturing equipment, in particular to a carbon fiber composite material folding propeller forming mold. Background Art

[0002] The propeller is an important power structure of the UAV, and plays a key role in the power, stability and other performance of the UAV. The propeller is the only structure that provides flying power for the UAV.

[0003] Carbon fiber composite propellers have the characteristics of light weight, high tensile strength, wear resistance, high force efficiency, low vibration, and weather resistance, and are widely used. Folding propellers are mostly used in model aircraft gliders, folding wing drones, etc. The blades can be folded to reduce the volume.

[0004] At present, the manufacturing methods of propeller blades include hand lay-up, injection molding, resin transfer molding, autoclave molding, compression molding, etc.

[0005] Among them, hand lay-up has low production efficiency and inconsistent quality control; resin transfer molding is difficult, prone to glue shortage and pores, and preform manufacturing is complex and costly; compression molding and injection molding require complex mold structures and high investment costs;

[0006] The production methods of folding propellers made of carbon fiber composite materials are mostly injection molding and compression molding, which has high initial production investment costs;

[0007] This patent describes a carbon fiber composite material folding propeller molding mold, which solves the technical problem that the production methods of carbon fiber composite material folding propellers are mostly injection molding and compression molding, and the initial production investment cost is high. Utility Model Content

[0008] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a carbon fiber composite material folding propeller forming mold to solve the above-mentioned technical problems.

[0009] The solution adopted by the utility model is: a carbon fiber composite material folding propeller forming mold, including an upper mold and a lower mold, characterized in that:

[0010] The upper die and the lower die are detachably connected, and both the upper die and the lower die are provided with a mold release groove;

[0011] An upper mold cavity is provided inside the upper mold, a lower mold cavity is provided inside the lower mold, a glue flow groove matching the lower mold cavity is provided on the lower mold, a reserved mold removal hole is provided on the lower mold, and a movable pin is provided in the reserved mold removal hole;

[0012] The upper mold and the lower mold cooperate to form a parting line, and the edge height of the lower mold cavity is not higher than the parting line to generate an overflow seam, which is connected with the glue flow groove and the interior of the upper mold cavity and the lower mold cavity.

[0013] Preferably, the lower die is provided with four groups of positioning pins, the upper die is provided with four groups of positioning holes cooperating with the positioning pins, and the four groups of positioning pins are evenly distributed on the lower die.

[0014] Preferably, the upper die and the lower die are connected via bolts.

[0015] Preferably, the glue flow grooves are arranged around the lower mold cavity.

[0016] Preferably, the upper die, the lower die, the movable pin and the positioning pin are all made of aluminum alloy.

[0017] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a stereogram of the utility model.

[0019] Figure 2 It is a three-dimensional diagram of the lower mold of the utility model.

[0020] Figure 3 It is a schematic diagram of an upper mold of the utility model.

[0021] Figure 4 It is a schematic diagram of the lower mold of the utility model.

[0022] Figure 5 It is a schematic AA sectional view of the lower die of the utility model.

[0023] Figure 6 It is the front view of the mold combination of the utility model.

[0024] Figure 7 It is a BB sectional view of the mold clamping front view of the utility model.

[0025] Figure 8 yes Figure 7 A partial enlarged view of .

[0026] Fig. 9 yes Figure 7 A partial enlarged view of B.

[0027] Reference numerals: 1, upper mold; 2, lower mold; 3, mold groove; 4, upper mold cavity; 5, lower mold cavity; 6, glue flow groove; 7, reserved mold removal hole; 8, movable pin; 11, parting line; 12, overflow glue seam; 13, positioning pin; 14, positioning hole. DETAILED DESCRIPTION

[0028] The above and other technical contents, features and functions of the present invention are described in detail below with reference to the attached Figure 1-9 The detailed description of the embodiments will clearly show that the structural contents mentioned in the following embodiments are all based on the drawings in the specification.

[0029] Various exemplary embodiments of the present utility model will be described below with reference to the accompanying drawings.

[0030] Embodiment 1, a carbon fiber composite material folding propeller forming mold, comprising an upper mold 1 and a lower mold 2, characterized in that:

[0031] The upper mold 1 and the lower mold 2 are detachably connected, and both the upper mold 1 and the lower mold 2 are provided with a mold starter groove 3;

[0032] An upper mold cavity 4 is provided inside the upper mold 1, a lower mold cavity 5 is provided inside the lower mold 2, a glue flow groove 6 matching with the lower mold cavity 5 is provided on the lower mold 2, a reserved mold removal hole 7 is provided on the lower mold 2, and a movable pin shaft 8 is provided in the reserved mold removal hole 7;

[0033] The upper mold 1 and the lower mold 2 cooperate to form a parting line 11, and the edge height of the mold cavity of the lower mold 2 is not higher than the parting line 11, generating a glue overflow seam 12, and the glue overflow seam 12 is connected with the glue flow groove 6 and the interior of the upper mold cavity 4 and the lower mold cavity 5;

[0034] The lower die 2 is provided with four groups of positioning pins 13, and the upper die 1 is provided with four groups of positioning holes 14 cooperating with the positioning pins 13. The four groups of positioning pins 13 are evenly distributed on the lower die 2;

[0035] The upper die 1 and the lower die 2 are connected via bolts;

[0036] The glue flow groove 6 is arranged around the lower mold cavity 5;

[0037] The upper die 1, the lower die 2, the movable pin 8 and the positioning pin 13 are all made of aluminum alloy.

[0038] When in use, the upper mold 1 and the lower mold 2 are matched under the action of the positioning pin 13 and the positioning hole 14, and the bolts are inserted into the bolt holes, the upper mold 1 and the lower mold 2 are matched, and the molds are tightened to form a mold line 11, and the layers are laid and then the molds are closed for hot pressing.

[0039] After completion, the bolts are opened to separate the upper mold 1 and the lower mold 2, and the movable pin 8 is separated from the reserved mold hole 7 by inserting a tool into the reserved mold hole 7 to complete the mold casting task;

[0040] Upper mold 1: an upper mold cavity 4 with a propeller arranged in the middle; installation positioning holes 14 are arranged at the four corners, and bolt holes are arranged at the four edges. The bolt holes are used to insert bolts when closing the mold, and tighten the mold to make it fit tightly. A mold stripping groove is arranged at the long side to facilitate mold opening after the product is formed;

[0041] Lower mold 2: A lower mold cavity 5 of the propeller is arranged in the middle, and glue flow grooves 6 are arranged around the lower mold cavity 5 to facilitate the discharge of excess air and glue during mold closing and blade curing. A mounting hole for a movable pin 8 is arranged at the blade root to locate and install the movable pin 8. Mounting positioning holes 14 are arranged at the four corners, and bolt holes are arranged on the four edges. The bolt holes are used to pass the mold bolts when closing the mold, and tighten the mold to make it fit tightly. A demoulding groove is arranged at the long side to facilitate mold opening after the product is formed;

[0042] Active pin 8: used to locate the installation hole at the root of the blade and to wrap the unidirectional tape of carbon fiber reinforced composite materials to strengthen the root strength of the blade. The installation hole wrapped in one piece does not need to be punched again, and the fiber structure of the carbon fiber is not damaged, so the strength is protected. At the same time, when opening the mold to take out the propeller product, the active pin 8 can be knocked out from the bottom, and the blade will be taken out together, which is convenient for taking out the mold;

[0043] Positioning pin 13: installed in the installation positioning hole 14 of the lower mold 2. When the mold is closed, the installation positioning hole 14 of the upper mold 1 corresponds to the positioning pin 13 for accurate mold closing;

[0044] After the mold is closed, the edge height of the mold cavity of the lower mold 2 will be slightly lower than the mold line 11, generating an overflow glue seam 12, which is connected to the glue flow groove 6 and the inside of the mold cavity, so as to facilitate the discharge of excess air and glue during mold closing and blade curing. The overall volume of the mold after mold closing is small, and multiple molds can be made for simultaneous production;

[0045] The entire mold structure is extremely simple and low-cost, which is convenient for the production of small batches of products. Multiple sets of molds can also be made and multiple people can operate production at the same time to improve efficiency.

[0046] The above description is only for illustrating the present invention, and it should be understood that the present invention is not limited to the above embodiments, and various variations that conform to the concept of the present invention are within the protection scope of the present invention.

Claims

1. A carbon fiber composite material folding propeller forming mold, comprising an upper mold (1) and a lower mold (2), characterized in that: The upper mold (1) and the lower mold (2) are detachably connected, and both the upper mold (1) and the lower mold (2) are provided with mold starter grooves (3); The upper mold (1) is provided with an upper mold cavity (4) inside, the lower mold (2) is provided with a lower mold cavity (5) inside, the lower mold (2) is provided with a glue flow groove (6) that cooperates with the lower mold cavity (5), the lower mold (2) is provided with a reserved mold removal hole (7), and a movable pin shaft (8) is provided in the reserved mold removal hole (7); The upper mold (1) and the lower mold (2) cooperate to form a parting line (11); the edge height of the mold cavity of the lower mold (2) is not higher than the parting line (11), thereby generating a glue overflow seam (12); the glue overflow seam (12) is connected to the glue flow groove (6) and the interior of the upper mold cavity (4) and the lower mold cavity (5).

2. The carbon fiber composite material folding propeller forming mold according to claim 1, characterized in that: The lower die (2) is provided with four groups of positioning pins (13), and the upper die (1) is provided with four groups of positioning holes (14) that cooperate with the positioning pins (13). The four groups of positioning pins (13) are evenly distributed on the lower die (2).

3. The carbon fiber composite material folding propeller forming mold according to claim 1, characterized in that: The upper die (1) and the lower die (2) are connected via bolts.

4. The carbon fiber composite material folding propeller forming mold according to claim 1, characterized in that: The glue flow groove (6) is arranged along the periphery of the lower mold cavity (5).

5. The carbon fiber composite material folding propeller forming mold according to claim 4, characterized in that: The upper die (1), the lower die (2), the movable pin (8) and the positioning pin (13) are all made of aluminum alloy.

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