A mold for in-mold injection molding of blade connecting rods

Abstract

The present invention relates to a mold for in-mold injection molding of a blade and a connecting rod, comprising a movable mold insert located on a movable mold, a blade and a connecting rod formed on the movable mold insert, a clamping block formed on the formed blade, a plurality of button holes formed on the formed connecting rod, a rotating block provided on the movable mold insert, the formed connecting rod located above the rotating block, a power source provided on the movable mold, the power source driving the rotating block to rotate, the formed connecting rod rotating synchronously with the rotating block until the connecting rod contacts the blade and the clamping block passes through the button hole, completing the assembly of the connecting rod and the blade. The movable mold insert of the present invention can simultaneously mold the blade and the connecting rod at one time, and at the same time, the rotating block drives the connecting rod to rotate, causing the clamping block to pass through the button hole, completing the assembly between the connecting rod and the blade. A set of molds can simultaneously complete the injection molding and assembly of the connecting rod and the blade, greatly saving production costs, reducing labor participation, assembling stably and efficiently, and saving space and time.

Description

Technical Field

[0001] The invention relates to a mold for in-mold injection molding of a blade connecting rod, and belongs to the technical field of injection molds. Background Art

[0002] A blade connecting rod is a mechanical structure that enables the synchronized movement of multiple blades through a connecting rod. It is widely used in the automotive, wind power, marine, aerospace, and other fields. Its core function is to transmit power and coordinate motion, ensuring that the blades rotate or adjust their angles according to a preset trajectory. Typically, the production of a blade connecting rod requires injection molding the connecting rod and multiple blades separately using two sets of molds. After the molded connecting rod and blades are demolded, they are manually assembled. However, manual assembly is slow, inefficient, and labor-intensive. Furthermore, the production cost of two sets of molds is high and takes up a lot of space. Summary of the Invention

[0003] The purpose of the present invention is to provide a mold for in-mold injection molding of a blade connecting rod, which saves production costs and has stable and efficient assembly, in view of the shortcomings of the existing technology.

[0004] To achieve the purpose, the present invention adopts the following technical solutions:

[0005] A mold for in-mold injection molding assembly of a blade and a connecting rod, comprising a movable mold insert located on a movable mold, a blade and a connecting rod being molded on the movable mold insert, a clamping block being formed on the formed blade, and a plurality of button holes being formed on the formed connecting rod, a rotating block being provided on the movable mold insert, the formed connecting rod being located above the rotating block, a power source being provided on the movable mold, the power source driving the rotating block to rotate, and the formed connecting rod rotating synchronously with the rotating block until the connecting rod contacts the blade and causes the clamping block to pass through the button hole, thereby completing the assembly of the connecting rod and the blade.

[0006] As a further optimization of the above technical solution: the power source is provided with two groups, the two groups of power sources are respectively located on both sides of the movable mold insert, the two groups of power sources each include a cylinder, a rack and a gear, the two gears are respectively fixed at both ends of the rotating block, the rack is slidably arranged on the movable mold, the gear is located above the rack and meshes with the rack, the cylinder is fixed on the movable mold, the piston rod of the cylinder is connected to the rack, the cylinder drives the rack to move, so that the gear and the rotating block rotate.

[0007] As a further optimization of the above technical solution: a plurality of first protrusions are provided at the end of the rotating block, and a first molding groove is formed on the first protrusion; a plurality of second protrusions are provided on the movable mold insert, and a second molding groove is formed on the second protrusion; the second protrusion is located between two adjacent first protrusions, and the first molding groove and the second molding groove together form a core for molding part of the connecting rod.

[0008] As a further optimization of the above technical solution: a plurality of ejector pins are provided on the ejector pin plate of the movable mold, a ejector block is provided on the top of the ejector pin, a plurality of ejector block grooves are formed on the movable mold insert, the bottom of the ejector block groove is formed with an ejector pin hole for the ejector pin to pass through, and a third molding groove is formed on the top of the ejector block, and the third molding groove and the groove wall of the ejector block groove together form a core for molding part of the blade.

[0009] As a further optimization of the above technical solution: after the assembly of the connecting rod and the blade is completed, the power source drives the rotating block to rotate and reset, so that the rotating block is separated from the connecting rod, and the ejector plate drives the ejector rod and the ejector block to move upward, and the ejector block ejects the assembled blade and the connecting rod out of the movable mold insert.

[0010] As a further optimization of the above technical solution: a slide groove is formed on the movable mold insert, a fixed block is installed in the slide groove, a protruding pressure block is provided on the top of the side of the fixed block, the rack is slidably arranged in the slide groove, a convex strip is provided on the side of the rack, and the pressure block is located above the convex strip and in contact with the convex strip.

[0011] As a further optimization of the above technical solution: a guide slope is formed on the side of the clamping block, the bottom of the clamping block is connected to the main body of the blade through a connecting column, a positioning step is formed between the clamping block and the connecting column, the diameter of the positioning step is larger than the diameter of the button hole, and long movable holes are connected on both sides of the button hole, the width of the movable hole is smaller than the diameter of the button hole, and a number of arc-shaped protrusions are provided on the connecting rod, and the arc-shaped protrusions are located on both sides of the button hole.

[0012] Compared with the prior art, the present invention can simultaneously form blades and connecting rods at one time, and at the same time, the connecting rod is driven to rotate by the rotating block, so that the clamping block passes through the buckle hole, completing the automatic assembly between the connecting rod and the blade. A set of molds can simultaneously complete the injection molding and assembly of the connecting rod and the blade, which greatly saves production costs, reduces manual participation, and the assembly is stable and efficient, saving space and time. When the rotating block drives the connecting rod to rotate, the connecting rod is separated from the second molding groove. After the connecting rod and the blade are assembled, the rotating block rotates and resets and disengages from the connecting rod, realizing two-stage demolding of the connecting rod, preventing the connecting rod from sticking to the dynamic mold insert or the rotating block, and ensuring smooth demolding of the connecting rod. The ejector plate drives the ejector rod and the ejector block to move upward, and the ejector block pushes the assembled blade and connecting rod out of the dynamic mold insert, completing the demolding of the blade connecting rod as a whole. The pulling force of the cylinder is converted into the rotation of the rotating block through the rack and gear, and the transmission is stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0014] Figure 2 It is a schematic diagram of the exploded structure of a part of the structure of the present invention.

[0015] Figure 3 It is a schematic diagram of the three-dimensional structure of the blades and connecting rods after assembly in the present invention.

[0016] Figure 4 yes Figure 3 Schematic diagram of the enlarged structure at point A in the middle. DETAILED DESCRIPTION

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Figure 1-4 As shown, a mold for in-mold injection molding of a blade and connecting rod assembly includes a movable mold insert 2 located on a movable mold 1. A blade 8 and a connecting rod 7 are molded on the movable mold insert 2. The molded blade 8 is formed with a retaining block 81, and the molded connecting rod 7 is formed with a plurality of button holes 71. A rotating block 3 is provided on the movable mold insert 2, and the molded connecting rod 7 is positioned above the rotating block 3. A power source is provided on the movable mold 1. After the movable and fixed molds are separated, the power source drives the rotating block 3 to rotate. After the molded connecting rod 7 rotates 180° synchronously with the rotating block 3, the connecting rod 7 contacts the blade 8 and allows the retaining block 81 to pass through the button holes 71, completing the assembly of the connecting rod 7 and the blade 8.

[0018] In the above technical solution: a plurality of first protrusions 31 are formed on the end of the rotating block 3, a first molding groove 32 is formed on the first protrusion 31, a plurality of second protrusions 21 are formed on the movable mold insert 2, a second molding groove 22 is formed on the second protrusion 21, the second protrusion 21 is located between two adjacent first protrusions 31, and the first molding groove 32 and the second molding groove 22 together form a core for molding part of the connecting rod 7.

[0019] In the above technical solution: the ejector plate 9 of the movable mold 1 is provided with a plurality of ejector pins 11, the tops of the ejector pins 11 are provided with ejector blocks 12, and the movable mold insert 2 is provided with a plurality of ejector block grooves 23, the bottoms of the ejector block grooves 23 being provided with ejector pin holes for the ejector pins 11 to pass through. A third molding groove 121 is provided on the top of the ejector block 12, and the third molding groove 121 and the groove wall of the ejector block groove 23 together form a core for molding part of the blade 8. After the assembly of the connecting rod 7 and the blade 8 is completed, the power source drives the rotating block 3 to rotate 180° and reset, so that the rotating block 3 is separated from the connecting rod 7. The ejector plate 9 drives the ejector pins 11 and ejector block 12 to move upward, and the ejector block 12 ejects the assembled blade 8 and connecting rod 7 out of the movable mold insert 2, while the reset rotating block 3 waits for the second production.

[0020] In the above technical solution, two power sources are provided, one on each side of the movable mold insert 2. Each power source includes a cylinder 4, a rack 5, and a gear 6. The two gears 6 are fixed to either end of the rotating block 3. The rack 5 is slidably mounted on the movable mold 1, and the gear 6 is positioned above and meshes with the rack 5. The cylinder 4 is fixed to the movable mold 1, and its piston rod is connected to the rack 5. The cylinder 4 drives the rack 5 to move, causing the gear 6 and the rotating block 3 to rotate.

[0021] In the above technical solution, the movable mold insert 2 is formed with a chute 24, a fixed block 25 is installed in the chute 24, and a protruding pressure block 251 is provided on the top of the side of the fixed block 25. The rack 5 is slidably arranged in the chute 24. The side of the rack 5 is provided with a ridge 51, and the pressure block 251 is located above and in contact with the ridge 51. The pressure block 251 and the ridge 51 cooperate to guide the movement of the rack 5 and prevent the rack 5 from falling out of the chute 24 during movement.

[0022] In the above technical solution: Figure 3 、 4As shown, the side of the block 81 is formed with a guide bevel 82, and the bottom of the block 81 is connected to the main body of the blade 8 via a connecting post 83. A positioning step is formed between the block 81 and the connecting post 83. The diameter of the positioning step is larger than the diameter of the button hole 71. The two sides of the button hole 71 are connected with long strips of movable holes 72. The width of the movable holes 72 is smaller than the diameter of the button hole 71. When the block 81 passes through the button hole 71, the button hole 71 undergoes elastic deformation. The movable holes 72 assist in the deformation of the button hole 71, and the guide bevel 82 guides the assembly process. After the block 81 passes through the button hole 71, the connecting post 83 is located in the button hole 71, and the button hole 71 is deformed and reset. When the rotating block 3 rotates and resets and drives the connecting rod 7 upward, the top surface of the button hole 71 contacts the bottom surface of the block 81, preventing the connecting rod 7 from disengaging from the blade 8, thereby disengaging the connecting rod 7 from the rotating block 3. The connecting rod 7 is provided with a plurality of arc-shaped protrusions 73, which are located on both sides of the button hole 71. The arc-shaped protrusions 73 reserve sufficient space for the arrangement of the button hole 71, enhance the strength of the side of the button hole 71, and prevent the button hole 71 from deforming and causing the connecting rod 7 to break.

[0023] The present invention can simultaneously form the blade 8 and the connecting rod 7 at one time, and at the same time, the connecting rod 7 is driven to rotate by the rotating block 3, so that the clamping block 81 passes through the buckle hole 71, and the automatic assembly between the connecting rod 7 and the blade 8 is completed. A set of molds can simultaneously complete the injection molding and assembly of the connecting rod 7 and the blade 8, greatly saving production costs, reducing manual participation, assembling stably and efficiently, saving space and time; when the rotating block 3 drives the connecting rod 7 to rotate, the connecting rod 7 is separated from the second molding groove 22. After the connecting rod 7 and the blade 8 are assembled, the rotating block 3 rotates and resets and disengages from the connecting rod 7, realizing the two-stage demoulding of the connecting rod 7, preventing the connecting rod 7 from sticking to the movable mold insert 2 or the rotating block 3, and ensuring that the connecting rod 7 is demoulded smoothly; the ejector plate 9 drives the ejector rod 11 and the ejector block 12 to move upward, and the ejector block 12 ejects the assembled blade 8 and the connecting rod 7 out of the movable mold insert 2, completing the demoulding of the blade connecting rod as a whole; the pulling force of the oil cylinder 4 is converted into the rotation of the rotating block 3 by the rack 5 and the gear 6, and the transmission is stable.

[0024] The above describes in detail the preferred embodiments of the present invention. It should be understood that those skilled in the art can make numerous modifications and variations based on the concepts of the present invention without inventive effort. Therefore, any technical solutions that can be derived by those skilled in the art through logical analysis, reasoning, or limited experimentation based on the concepts of the present invention and the prior art should fall within the scope of protection of the present invention.

Claims

1. A mold for in-mold injection molding of blade and connecting rod, comprising a movable mold insert (2) located on a movable mold (1), a blade (8) and a connecting rod (7) being molded on the movable mold insert (2), a clamping block (81) being formed on the blade (8) after molding, and a plurality of buckle holes (71) being formed on the connecting rod (7) after molding, characterized in that The movable mold insert (2) is provided with a rotating block (3), the formed connecting rod (7) is located above the rotating block (3), the movable mold (1) is provided with a power source, the power source drives the rotating block (3) to rotate, and the formed connecting rod (7) rotates synchronously with the rotating block (3) until the connecting rod (7) contacts the blade (8) and the clamping block (81) passes through the buckle hole (71), thereby completing the assembly of the connecting rod (7) and the blade (8); The ejector plate (9) of the movable mold (1) is provided with a plurality of ejector pins (11), the top of each ejector pin (11) is provided with an ejector block (12), the movable mold insert (2) is provided with a plurality of ejector block grooves (23), the bottom of each ejector block groove (23) is provided with an ejector pin hole for the ejector pin (11) to pass through, the top of the ejector block (12) is provided with a third molding groove (121), the third molding groove (121) and the groove wall of the ejector block groove (23) together form a core for molding part of the blade (8); After the assembly of the connecting rod (7) and the blade (8) is completed, the power source drives the rotating block (3) to rotate and reset, so that the rotating block (3) is separated from the connecting rod (7), and the ejector plate (9) drives the ejector rod (11) and the ejector block (12) to move upward, and the ejector block (12) ejects the assembled blade (8) and the connecting rod (7) out of the movable mold insert (2).

2. The mold for in-mold injection molding of a blade connecting rod according to claim 1, characterized in that The power source is provided with two groups, and the two groups of power sources are respectively located on both sides of the movable mold insert (2). The two groups of power sources each include an oil cylinder (4), a rack (5) and a gear (6). The two gears (6) are respectively fixed at both ends of the rotating block (3). The rack (5) is slidably arranged on the movable mold (1). The gear (6) is located above the rack (5) and meshes with the rack (5). The oil cylinder (4) is fixed on the movable mold (1). The piston rod of the oil cylinder (4) is connected to the rack (5). The oil cylinder (4) drives the rack (5) to move, so that the gear (6) and the rotating block (3) rotate.

3. The mold for in-mold injection molding of blade connecting rod according to claim 1, characterized in that The end of the rotating block (3) is provided with a plurality of first protrusions (31), and the first protrusions (31) are formed with first molding grooves (32). The movable mold insert (2) is provided with a plurality of second protrusions (21), and the second protrusions (21) are formed with second molding grooves (22). The second protrusions (21) are located between two adjacent first protrusions (31), and the first molding grooves (32) and the second molding grooves (22) together form a core for molding a portion of the connecting rod (7).

4. The mold for in-mold injection molding of a blade connecting rod according to claim 2, characterized in that The movable mold insert (2) is provided with a slide groove (24), a fixed block (25) is installed in the slide groove (24), a protruding pressing block (251) is provided on the top of the side of the fixed block (25), the rack (5) is slidably arranged in the slide groove (24), a convex strip (51) is provided on the side of the rack (5), and the pressing block (251) is located above the convex strip (51) and contacts the convex strip (51).

5. The mold for in-mold injection molding of blade connecting rod according to claim 1, characterized in that A guide slope (82) is formed on the side of the clamping block (81), and the bottom of the clamping block (81) is connected to the main body of the blade (8) through a connecting column (83). A positioning step is formed between the clamping block (81) and the connecting column (83), and the diameter of the positioning step is larger than the diameter of the buckle hole (71). Both sides of the buckle hole (71) are connected with long strip-shaped movable holes (72), and the width of the movable holes (72) is smaller than the diameter of the buckle hole (71). The connecting rod (7) is provided with a plurality of arc-shaped protrusions (73), and the arc-shaped protrusions (73) are located on both sides of the buckle hole (71).

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