An automatic injection positioning mechanism for a drill needle handle insert embedded part

Abstract

The application discloses a kind of automatic injection molding positioning mechanism of drill needle handle insert embedded part, including injection molding fixed mold plate and injection molding movable mold plate, injection molding fixed mold plate and injection molding movable mold plate are installed on same mold frame, it is characterized in that: the upper surface of the injection molding fixed mold plate is equipped with two symmetrical distribution fixed mold plate injection molding cavities, the surface of the injection molding fixed mold plate is also equipped with two symmetrical distribution positioning placement grooves, the center line of the positioning placement groove is aligned with the center line of fixed mold plate injection molding cavity, and the one end of positioning placement groove and fixed mold plate injection molding cavity are equipped with butt joint groove, the middle of positioning placement groove is V-shaped recess downward and bottom is circular arc shape.The insert embedded part of drill needle handle injection molding connection is compressed and positioned by positioning block plug-in in butt joint groove, so as to avoid the insert embedded part of drill needle handle injection molding connection to appear deviation in injection molding process, so as to guarantee the quality after drill needle handle production.

Description

Technical Field

[0001] This invention relates to the field of injection mold technology, specifically to an automated injection positioning mechanism for a drill needle handle insert. Background Technology

[0002] A drill bit is a metal needle-like object, usually made of stainless steel or titanium alloy, with a diameter ranging from 0.5 to 4 mm. Its core functions include: fixing fracture ends by penetrating bone, reducing displacement to promote healing; and using it for core decompression or bone grafting assistance in surgeries such as femoral head necrosis. Orthopedic drill bits are specialized instruments used for drilling and fixing bones in orthopedic surgery, mainly including types such as Kirschner wires. Drill bits require an injection molding process during production. Injection molding, also known as injection molding, is a molding method that combines injection and molding. The advantages of injection molding are high production speed, high efficiency, automation, a wide variety of colors and shapes, and sizes, with precise product dimensions, easy product updates, and the ability to produce complex-shaped parts. Injection molding is suitable for mass production and molding processing fields such as complex-shaped products.

[0003] However, during the injection molding process, the handle insert of the drill needle handle may be displaced due to the impact of the molten fluid, resulting in quality defects in the drill needle handle after injection molding. Therefore, it does not meet the existing requirements. To address this, we propose an automated injection positioning mechanism for the drill needle handle insert. Summary of the Invention

[0004] The purpose of this invention is to provide an automated injection molding positioning mechanism for the insert of a drill needle handle, in order to solve the problem mentioned in the background art that the insert of the drill needle handle will be displaced due to the impact of the molten fluid during the injection molding process, resulting in defects in the quality of the drill needle arm after injection molding.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an automated injection molding positioning mechanism for a drill needle handle insert, comprising a fixed injection mold and a movable injection mold, wherein the fixed injection mold and the movable injection mold are mounted on the same mold frame, characterized in that: the upper surface of the fixed injection mold is provided with two symmetrically distributed fixed mold injection cavities, and the surface of the fixed injection mold is also provided with two symmetrically distributed positioning grooves, the center line of the positioning grooves is aligned with the center line of the fixed mold injection cavity, and a docking groove is provided between one end of the positioning groove and the fixed mold injection cavity, the positioning groove is V-shaped indented downward in the middle and has an arc-shaped bottom, and an extension support block is fixed inside the docking groove, one end of the extension support block is docked with the end of the positioning groove, and the other end of the extension support block is flush with the inner wall of the fixed mold injection cavity;

[0006] The bottom surface of the injection mold has two symmetrically distributed injection mold cavities, and the positions of the injection mold cavities of the injection mold are aligned vertically with those of the fixed mold cavity. An injection gate sleeve is embedded in the center of the injection mold cavity of the injection mold. Two injection tubes are inserted through the inside of the injection mold cavity of the injection mold. One end of the injection tube is fixed and connected to the injection gate sleeve. Two positioning blocks are also fixed on the bottom surface of the injection mold. The positioning blocks are located directly above the docking groove, and the bottom of the positioning blocks is provided with a U-shaped groove.

[0007] Preferably, one side of the injection molding template is provided with an installation groove and two guide holes. A positioning component is installed on this side of the injection molding template, and the two guide holes are connected to two sealing filler inserts, and the axis of the guide holes coincides with the center line of the positioning groove.

[0008] Preferably, the positioning component includes an actuating electric telescopic rod, which is inserted into the mounting groove. A movable plate is fixed to the movable end of the actuating electric telescopic rod. Positioning pins are fixed to both ends of the movable plate facing the injection molding template. The positioning pins are inserted into the guide hole and slidably connected to the injection molding template.

[0009] Preferably, the upper surface of the extended support block is an arc-shaped surface, and the curvature and center of the arc-shaped surface coincide with the curvature and center of the arc-shaped surface in the middle of the positioning groove.

[0010] Preferably, a buffer groove is provided between the positioning block and the injection molding cavity of the fixed template, and a receiving hole is provided on both sides of the docking groove.

[0011] Preferably, a filling electric telescopic rod is fixed to the inner side of the storage hole, and a molded mating inlay plate is fixed to the movable end of the filling electric telescopic rod.

[0012] Preferably, the molded mating insert includes a straight rod portion and a circular plate portion, the circular plate portion being fixed to the end of the filling electric telescopic rod, and the straight rod portion being located inside the buffer groove.

[0013] Preferably, a sealing filler insert is fixed to the end of the straight rod portion away from the circular piece portion, and the sealing filler insert has two straight sides and one arc-shaped side.

[0014] Preferably, the center of the arc-shaped side of the sealing filler insert coincides with the center of the arc-shaped top surface of the extension support block.

[0015] Preferably, the width of the U-shaped groove is consistent with the outer diameter of the insert / embedded part.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. By placing the insert to be injection molded and connected to the drill needle handle inside the positioning groove, and by inserting the positioning block into the docking groove, the insert to be injection molded and connected to the drill needle handle is pressed and positioned, thereby preventing the insert to be injection molded and connected to the drill needle handle from shifting during the injection molding process and ensuring the quality of the drill needle handle after production.

[0018] 2. The movement of the molding mating insert plate is controlled by the filling electric telescopic rod, and the buffer groove between the positioning pressure block and the fixed template injection cavity is sealed by the molding mating insert plate. At the same time, the gap between the positioning pressure block, the extension support block, the molding mating insert plate and the insert is filled by the sealing filling insert, so as to ensure that the fixed template injection cavity and the moving template injection cavity form a closed cavity after the mold is closed.

[0019] 3. The electric telescopic rod is used to move the moving plate and the positioning pin, so that the positioning pin moves closer to the end of the positioning slot and pushes the insert placed inside the positioning slot until the insert contacts the end of the positioning slot, thereby adjusting the position of the insert. Attached Figure Description

[0020] The disclosure of this invention will become more readily understood with reference to the accompanying drawings. It will be readily understood by those skilled in the art that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. Furthermore, similar numbers in the drawings are used to denote similar components, wherein:

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram showing the unfolded shape of the fixed injection mold and the moving injection mold of the present invention;

[0023] Figure 3 This is a schematic diagram of the positioning component of the present invention;

[0024] Figure 4 This is a schematic diagram of the injection molding moving template of the present invention;

[0025] Figure 5 This is a schematic diagram of the injection molding template of the present invention;

[0026] Figure 6 for Figure 5 Enlarged view of the structure at point A in the middle;

[0027] Figure 7 This is an exploded view of the electric telescopic rod and the injection molded template of the present invention.

[0028] Figure 8 for Figure 7 Enlarged view of the structure at point B;

[0029] Figure 9 This is a cross-sectional view of the injection molding template of the present invention;

[0030] Figure 10 for Figure 9 Enlarged view of the structure at point C;

[0031] Figure 11 This is a schematic diagram of the positioning block of the present invention.

[0032] In the diagram: 1. Fixed injection mold; 2. Moving injection mold; 3. Injection tube; 4. Buffer groove; 5. Positioning block; 6. Positioning placement groove; 7. Fixed mold injection cavity; 8. Positioning assembly; 81. Electric telescopic rod; 82. Moving plate; 83. Positioning ejector pin; 9. Moving mold injection cavity; 10. Injection gate sleeve; 11. Butt joint groove; 12. U-shaped slot; 13. Mounting groove; 14. Guide hole; 15. Extension support block; 16. Molding mating insert plate; 17. Sealing filler insert; 18. Storage hole; 19. Electric telescopic filler rod. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0035] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0036] In the description of this invention, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the workpiece of this invention is in use. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0037] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0040] like Figure 1 As shown, an automated injection molding positioning mechanism for a drill needle handle insert includes a fixed injection mold 1 and a movable injection mold 2, which are mounted on the same mold frame.

[0041] like Figure 2 , Figure 4 and Figure 11As shown, the bottom surface of the injection molded moving template 2 is provided with two symmetrically distributed moving template injection mold cavities 9, and the position of the moving template injection mold cavity 9 is aligned vertically with the fixed template injection mold cavity 7. An injection gate sleeve 10 is embedded in the center of the moving template injection mold cavity 9. Two injection tubes 3 are inserted through the inside of the moving template injection mold cavity 9. One end of the injection tube 3 is fixed and connected to the injection gate sleeve 10. Two positioning blocks 5 are also fixed on the bottom surface of the injection molded moving template 2. The positioning blocks 5 are located directly above the docking groove 11. The bottom of the positioning blocks 5 is provided with a U-shaped groove 12. The width of the U-shaped groove 12 is consistent with the outer diameter of the insert.

[0042] like Figure 2 , Figure 3 , Figures 5 to 10 As shown, the upper surface of the injection molding template 1 has two symmetrically distributed injection molding cavities 7. The surface of the injection molding template 1 also has two symmetrically distributed positioning grooves 6. The centerline of the positioning groove 6 is aligned with the centerline of the injection molding cavity 7, and a mating groove 11 is provided between one end of the positioning groove 6 and the injection molding cavity 7. The cross-section of the positioning groove 6 is V-shaped and concave with a rounded bottom. An extension support block 15 is fixed to the bottom of the mating groove 11. One end of the extension support block 15 is mated to the end of the positioning groove 6, and the other end of the extension support block 15 is flush with the inner wall of the injection molding cavity 7. The insert to be injection molded and connected to the drill needle handle is placed inside the positioning groove 6, and the positioning pressure block 5 is inserted into the mating groove 11 to press and position the insert to be injection molded and connected to the drill needle handle, thereby preventing the insert to be injection molded and connected to the drill needle handle from shifting during the injection molding process.

[0043] The upper surface of the extension support block 15 is an arc-shaped surface, and the curvature and center of the arc-shaped surface coincide with the curvature and center of the arc-shaped surface in the middle of the positioning groove 6. The extension support block 15 supports the part of the insert that passes through the docking groove 11, thereby ensuring that the insert will not be lifted due to the squeezing of the positioning block 5 when it enters the inner side of the docking groove 11. A buffer groove 4 is provided between the positioning block 5 and the fixed template injection cavity 7. A receiving hole 18 is provided on both sides of the docking groove 11. A filling electric telescopic rod 19 is fixed inside the receiving hole 18. A molding mating insert plate 16 is fixed to the movable end of the filling electric telescopic rod 19. The movement of the molding mating insert plate 16 is controlled by the filling electric telescopic rod 19, and the molding mating insert plate 16 seals the buffer groove 4 between the positioning block 5 and the fixed template injection cavity 7, thereby ensuring that the fixed template injection cavity 7 and the moving template injection cavity 9 form a closed cavity after the mold is closed.

[0044] The molding mating insert 16 includes a straight rod portion and a circular plate portion. The circular plate portion is fixed to the end of the filling electric telescopic rod 19. The straight rod portion is located inside the buffer groove 4. A sealing filling insert 17 is fixed to the end of the straight rod portion away from the circular plate portion. The cross-section of the sealing filling insert 17 is U-shaped, including an arc-shaped side at the bottom and straight edges that are respectively connected to the two sides of the arc-shaped side. The center of the arc-shaped side of the sealing filling insert 17 coincides with the center of the arc-shaped surface at the top of the extension support block 15. The sealing filling insert 17 is used to fill the gap between the extension support block 15, the molding mating insert 16, the positioning pressure block 5 and the insert embedded part, thereby ensuring the overall sealing of the fixed mold plate injection cavity 7 and the moving mold plate injection cavity 9 after the mold is closed.

[0045] like Figure 2 , Figure 3 and Figure 5 As shown, one side of the injection molding template 1 is provided with an installation groove 13 and two guide holes 14, and a positioning component 8 is also installed on this side. The two guide holes 14 are connected to two sealing filler inserts 17, and the axis of the guide holes 14 coincides with the center line of the positioning placement groove 6. The positioning component 8 includes an actuating electric telescopic rod 81, which is inserted into the installation groove 13. A movable plate 82 is fixed to the movable end of the actuating electric telescopic rod 81. Positioning pins 83 are fixed at both ends of the movable plate 82 facing the injection molding template 1. The positioning pins 83 are inserted into the guide holes 14 and are slidably connected to the injection molding template 1. The upper surface of the extension support block 15 is an arc-shaped surface, and the curvature and center of the arc-shaped surface coincide with the curvature and center of the arc-shaped surface in the middle of the positioning placement groove 6. The extension support block 15 supports the part of the insert that passes through the docking groove 11, so as to ensure that the insert will not be lifted due to the squeezing of the positioning block 5 when the positioning block 5 enters the inner side of the docking groove 11. The electric telescopic rod 81 drives the moving plate 82 and the positioning pin 83 to move, so that the positioning pin 83 moves closer to the end of the positioning placement groove 6, pushing the insert placed inside the positioning placement groove 6 until the insert contacts the end of the positioning placement groove 6, thereby correcting the position of the insert.

[0046] The working principle of the automated injection molding positioning mechanism for a drill bit handle insert embedded part disclosed herein is as follows: When the drill bit handle is injection molded to the insert embedded part, the insert embedded part is first placed inside the positioning groove 6. Since the middle part of the positioning groove 6 is concave downward, the insert embedded part automatically slides down to the middle of the positioning groove 6. Then, the power supply of the actuator electric telescopic rod 81 is turned on and started. The actuator electric telescopic rod 81 drives the moving plate 82 to move closer to the injection molding fixed platen 1. At this time, the moving plate 82 drives the positioning ejector pin 83 to move and... The positioning ejector pin 83 extends from the inner wall of the injection cavity 7 of the fixed mold platen and approaches the insert. After the positioning ejector pin 83 approaches the insert, it pushes the insert to slide inside the positioning groove 6 until the end of the insert contacts the end of the positioning groove 6. Then, the hydraulic mold closing structure of the injection mold drives the injection moving mold platen 2 to move down. After moving down, the bottom end of the positioning block 5 enters the inner side of the mating groove 11, and the insert enters the inner side of the U-shaped groove 12 until the injection moving mold platen 2 and the injection fixed mold platen 1 are closed. At this time, the insert and the U-shaped groove 12 are closed. The top contacts the molded part, and a buffer groove 4 is formed between the positioning block 5 and the fixed molded cavity 7. At this time, the filling electric telescopic rod 19 is energized and the molding mating insert 16 moves closer to the inner wall of the fixed molded cavity 7 until the molding mating insert 16 enters the end of the receiving hole 18 and the inner side of the buffer groove 4, and the outer surface of the molding mating insert 16 is flush with the inner wall of the fixed molded cavity 7. At this time, as the molding mating insert 16 moves, the sealing filling insert 17 is inserted between the extension support block 15, the positioning block 5 and the insert embedded part, so that... After the fixed mold plate injection cavity 7 and the moving mold plate injection cavity 9 are closed, a sealed injection space is formed. Next, the electric telescopic rod 81 drives the moving plate 82 and the positioning pin 83 to reset and start the injection molding process. The molten material is injected into the space between the fixed mold plate injection cavity 7 and the moving mold plate injection cavity 9 through the injection tube 3 and the injection gate sleeve 10 until the material cools and fuses and is fixed with the insert. This prevents the insert connected to the drill needle handle from shifting during the injection process, thus ensuring the quality of the drill needle handle after production.

[0047] Note that the above description is merely a preferred embodiment of the present invention and the techniques employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. An automated injection molding positioning mechanism for a drill needle handle insert, comprising a fixed injection mold plate (1) and a movable injection mold plate (2), wherein the fixed injection mold plate (1) and the movable injection mold plate (2) are mounted on the same mold frame, characterized in that: The upper surface of the injection molding template (1) is provided with two symmetrically distributed injection molding cavities (7). The surface of the injection molding template (1) is also provided with two symmetrically distributed positioning grooves (6). The center line of the positioning groove (6) is aligned with the center line of the injection molding cavity (7). A docking groove (11) is provided between one end of the positioning groove (6) and the injection molding cavity (7). The cross-section of the positioning groove (6) is V-shaped and the bottom is arc-shaped. An extension support block (15) is fixed at the bottom of the docking groove (11). One end of the extension support block (15) is docked with the end of the positioning groove (6). The other end of the extension support block (15) is flush with the inner wall of the injection molding cavity (7). The upper surface of the extension support block (15) is arc-shaped, and the curvature and center of the arc-shaped surface coincide with the curvature and center of the arc-shaped surface of the positioning groove (6). The bottom surface of the injection molding moving template (2) is provided with two symmetrically distributed moving template injection cavities (9), and the position of the moving template injection cavity (9) is aligned vertically with the fixed template injection cavity (7). An injection gate sleeve (10) is embedded in the center of the moving template injection cavity (9). Two injection tubes (3) are inserted through the inside of the moving template injection cavity (9). One end of the injection tube (3) is fixed and connected to the injection gate sleeve (10). The bottom surface of the injection molding moving template (2) is also fixed with two positioning blocks (5). The positioning blocks (5) are located directly above the docking groove (11). The bottom of the positioning blocks (5) is provided with a U-shaped groove (12). A buffer groove (4) is provided between the fixed template injection cavity (7). Both sides of the docking groove (11) are provided with receiving holes (18). A filling electric telescopic rod (19) is fixed inside the receiving hole (18). A molding mating inlay plate (16) is fixed at the movable end of the filling electric telescopic rod (19). The molding mating inlay plate (16) includes a straight rod part and a circular plate part. The circular plate part is fixed to the end of the filling electric telescopic rod (19). The straight rod part is located inside the buffer groove (4). A sealing filling insert (17) is fixed at the end of the straight rod part away from the circular plate part. The cross-section of the sealing filling insert (17) is U-shaped, and the side of the bottom of the sealing filling insert (17) is arc-shaped. The injection molding template (1) has an installation groove (13), two guide holes (14) and a positioning component (8) on one side. The two guide holes (14) are connected to the docking groove (11) where the two sealing filler inserts (17) are located, and the axis of the guide hole (14) coincides with the center line of the positioning placement groove (6). The positioning component (8) includes an electric telescopic rod (81), which is inserted into the installation groove (13). The movable end of the electric telescopic rod (81) is fixed with a moving plate (82). The moving plate (82) has positioning pins (83) fixed at both ends of the surface facing the injection molding template (1). The positioning pins (83) are inserted into the guide holes (14) and are slidably connected to the injection molding template (1).

2. The automated injection molding positioning mechanism for a drill bit handle insert according to claim 1, characterized in that: The center of the arc-shaped side at the bottom of the sealing filler insert (17) coincides with the center of the arc-shaped surface at the top of the extension support block (15).

3. The automated injection molding positioning mechanism for a drill bit handle insert according to claim 1, characterized in that: The width of the U-shaped slot (12) is consistent with the outer diameter of the insert.

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