Hairpin tube forming equipment and operation method thereof

Abstract

The invention discloses hairpin tube forming equipment and an operation method thereof, and relates to the technical field of injection molding equipment. The mold comprises a rack, a fixed mold and a movable mold are installed on the rack, and the movable mold is installed on the fixed mold in a sliding mode in the first direction through a hydraulic rod; the ejection structure is mounted on the rack, and the ejection structure comprises a mounting plate which is mounted on the rack in a sliding manner. When the device is used, a hairpin tube raw material can be formed in an injection molding mode through cooperation of the fixed mold and the movable mold, after forming is completed, the movable mold and the fixed mold are pushed through the hydraulic rod to be separated, meanwhile, the extension plate slides in the sliding cavity, and when the extension plate slides to make contact with the side plate, the side plate can slide in the sliding cavity. The hydraulic rod drives the ejector rod to move, so that the ejector rod ejects the hairpin tube out of the cavity of the fixed mold, and the hairpin tube is pulled out from the space between the movable mold and the fixed mold through the cooperation of the pulling clamp, so that the movable mold and the fixed mold cannot shield the hairpin tube, and subsequent blanking through a manipulator is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of injection molding equipment, and particularly relates to a hairpin tube forming device and an operation method thereof. Background Art

[0002] Hairpins are common daily necessities in life, which are used to help women manage their hair. There are various types of hairpins, including U-shaped hairpins, spring hairpins, and tubular hairpins. Among them, the tubular hairpin is also called a hairpin tube or a cylindrical hairpin, which is mostly used to clamp the bangs. When preparing the hairpin tube, due to its special tubular appearance, it is mostly prepared by injection molding with the cooperation of an injection molding machine.

[0003] After the existing injection molding machine finishes injection molding, when the hairpin tube needs to be unloaded, the moving mold and the fixed mold are first separated, and then the hairpin tube is taken out by a manipulator. However, since the hairpin tube is cylindrical, there must be a rod body at the inner circle position of the moving mold and the fixed mold so that the hairpin tube can be cylindrical after molding. Therefore, when unloading, the manipulator needs to be extended between the moving mold and the fixed mold, clamp the hairpin tube, and then slide it along the axis direction of the rod on the mold to separate the hairpin tube from the mold. Finally, the manipulator is withdrawn from between the moving mold and the fixed mold to complete the unloading. The entire unloading process requires many steps and an additional sliding track needs to be provided for the manipulator.

[0004] In view of the above problems, the present invention proposes a hairpin tube forming device and an operation method thereof to improve this problem. Summary of the Invention

[0005] The purpose of the present invention is: to solve the problems in the above background art, the present invention provides a hairpin tube forming device and an operation method thereof.

[0006] The present invention specifically adopts the following technical solutions to achieve the above purpose: A hairpin tube forming device, comprising: A frame on which a fixed mold and a moving mold are installed, and the moving mold is slidably installed on the fixed mold along a first direction by a hydraulic rod; An ejection structure installed on the frame. The ejection structure includes a mounting plate slidably installed on the frame. A ejector rod is installed on the mounting plate, and the ejector rod penetrates through the fixed mold and is located in the cavity of the fixed mold. An extension plate is installed on the hydraulic rod, and a plurality of side plates are installed on the mounting plate. There is a sliding cavity for accommodating the extension plate between the side plates; A pulling clamp slidably installed on the frame along a second direction, and the pulling clamp is used to clamp the hairpin tube.

[0007] Furthermore, a pull rod is slidably mounted on the frame, a gear is rotatably mounted on the frame, a first rack meshing with the gear is mounted on the mounting plate, a second rack meshing with the gear is mounted on the pull rod, a cavity is opened on the ejection rod, and a piston rod slidably inserted in the cavity is mounted on the pull rod.

[0008] Furthermore, a positioning hole is provided on the fixed mold, and a positioning column for being inserted into the positioning hole is installed on the movable mold. The pulling and pulling clamp includes a sliding plate slidably installed on the frame through an electric slide rail, and half-jaws are symmetrically hinged on the sliding plate, and a magnetic block is installed on the free end of the half-jaws. A driving rod is slidably installed on the sliding plate, and a telescopic rod is hinged on the sliding plate. The free end of the telescopic rod is hinged to the driving rod, and a pressure plate is installed on the half-jaw. When the telescopic rod conflicts with the positioning column, the driving rod conflicts with the pressure plate to make the half-jaw rotate, and a one-way structure is provided on the sliding plate so that when the driving rod slides to reset, the height of the telescopic rod is lower than the height of the positioning column.

[0009] Furthermore, a transverse plate is installed on the half-jaw, and when the half-jaw contacts the hairpin tube, the transverse plate abuts against the hairpin tube.

[0010] Furthermore, a limiting arc plate is installed on the fixed mold, and an accommodating groove for accommodating the limiting arc plate is opened on the movable mold. The limiting arc plate is located on a side of the fixed mold cavity away from the electric slide rail.

[0011] Furthermore, the one-way structure includes a sliding groove opened on the sliding plate for accommodating the driving rod, the telescopic rod is slidably connected to the driving rod, a connecting spring is installed between the inner wall of the sliding groove and the driving rod, a resistance spring is installed on the driving rod, an arc block is installed at the free end of the resistance spring, a plurality of arc grooves for accommodating the arc blocks are opened in the sliding groove, and a cross bar for resisting the telescopic rod is installed on the frame.

[0012] Furthermore, an extension rod is installed on the telescopic rod, the telescopic rod contacts the positioning column through the extension rod, and the distance from the free end of the extension rod to the hinge point is greater than the distance between the hinge end of the telescopic rod and the driving rod to the hinge point.

[0013] Furthermore, a lifting plate is installed on the frame, the lifting plate is flush with the track surface of the electric slide rail, and an inclined plate is installed on the lifting plate, and the inclined surface of the inclined plate faces the fixed mold.

[0014] Furthermore, a resistance rod penetrating the half-jaw is slidably mounted on the half-jaw, the resistance rod being used to resist the hairpin tube, and a pulling spring is mounted between the resistance rod and the half-jaw.

[0015] The present invention also discloses an operation method of a hairpin tube forming device, which is applicable to any of the hairpin tube forming devices described above, and comprises the following steps: S1. Inject the hairpin tube raw material between the fixed mold and the moving mold for injection molding; S2. After the hairpin tube is formed, use the hydraulic rod to push the moving mold to open the mold, and during the process, also push out the hairpin tube through the ejector rod; S3. Drive the sliding plate to approach the fixed mold through the electric slide rail, and clamp the formed hairpin tube with the semi-jaw; S4. After the semi-jaw clamps the hairpin tube, the electric slide rail drives the hairpin tube to move outside the moving mold and the fixed mold for blanking.

[0016] The beneficial effects of the present invention are as follows: When the present invention is in use, through the cooperation between the fixed mold and the moving mold, the hairpin tube raw material can be formed by injection molding. After forming, use the hydraulic rod to push the moving mold and the fixed mold to separate, and at the same time, the extension plate slides in the sliding cavity. When the extension plate slides to contact the side plate, the hydraulic rod drives the ejector rod to move so that the ejector rod pushes the hairpin tube out of the fixed mold cavity. Through the cooperation of the pulling fixture, the hairpin tube is pulled out between the moving mold and the fixed mold, so that the moving mold and the fixed mold will not block the hairpin tube, which is convenient for subsequent blanking by the manipulator. Description of the Drawings

[0017] Figure 1 is the three-dimensional structure schematic diagram of the present invention; Figure 2 is the structure schematic diagram of the pulling fixture of the present invention; Figure 3 is the structure schematic diagram on the frame of the present invention; Figure 4 is the structure schematic diagram on the mounting plate of the present invention; Figure 5 is the structure schematic diagram on the sliding plate of the present invention; Figure 6 is the exploded view of part of the structure of the present invention; Figure 7 is the exploded view of the moving mold and the fixed mold structure of the present invention; Figure 8 is the exploded view of the structure on the semi-jaw of the present invention; Figure 9 is the present invention Figure 5 the three-dimensional cross-sectional view of the structure in; Figure 10 is the present invention Figure 7 the three-dimensional cross-sectional view of the structure in; Figure 11 is the present invention Figure 4 the three-dimensional cross-sectional view of the structure in; Figure 12 is the three-dimensional cross-sectional view of the drive rod and its structure on the present invention; Figure 13is the present invention Figure 12 The enlarged view at position A in Figure 14 is a schematic diagram of the operation method of the hairpin tube forming equipment of the present invention.

[0018] Reference numerals: 1, frame; 101, fixed mold; 102, movable mold; 103, hydraulic rod; 104, positioning column; 105, positioning hole; 2, ejection structure; 201, ejection rod; 202, mounting plate; 203, side plate; 204, extension plate; 205, sliding cavity; 3, pull clamp; 301, electric slide rail; 302, sliding plate; 303, half clamp jaw; 304, magnetic block; 305, driving rod; 306, telescopic rod; 307, cross plate; 308, pressure receiving plate; 309, cross bar; 4, pull rod; 5, gear; 6, first rack; 7, cavity; 8, piston rod; 9, second rack; 10, limiting arc plate; 11, receiving groove; 12, sliding groove; 13, connecting spring; 14, resisting spring; 15, arc block; 16, arc groove; 17, extension rod; 18, lifting plate; 19, inclined plate; 20, resisting rod; 21, pulling spring; 22, concave groove; 23, reset spring; 24, positioning convex block; 25, shielding plate. Detailed implementation manners

[0019] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0020] As Figure 1 - Figure 14 shown, a hairpin tube forming equipment proposed by the present invention in an embodiment includes: A frame 1, on which a fixed mold 101 and a movable mold 102 are installed. The movable mold 102 is slidably installed on the fixed mold 101 along a first direction through a hydraulic rod 103. Taking Figure 1 the main perspective, the first direction is the vertical direction. Cavities for accommodating the raw materials of the hairpin tube are provided on both the fixed mold 101 and the movable mold 102. When the fixed mold 101 and the movable mold 102 are closed, they function as a mold. An injection hole is provided on the movable mold 102, so that the raw materials can enter the cavity between the movable mold 102 and the fixed mold 101. The raw materials can be injection molded between the movable mold 102 and the fixed mold 101 to form a hairpin tube. During use, the telescopic movement of the telescopic end of the hydraulic rod 103 drives the movable mold 102 to approach or move away from the fixed mold 101, so that the mold is closed or opened; An ejection structure 2, installed on the frame 1. The ejection structure 2 includes a mounting plate 202 slidably installed on the frame 1. Taking Figure 1From the main perspective, the mounting plate 202 slides on the frame 1 in the vertical direction. The mounting plate 202 is equipped with an ejector rod 201, which penetrates the fixed mold 101 and is located in the cavity of the fixed mold 101. There are two ejector rods 201, which are located on the bottom surface of the cavity of the fixed mold 101. When the ejector rod 201 pushes the hairpin tube, the force applied to the hairpin tube is relatively uniform, which increases the stability of the hairpin tube when it is pushed. An extension plate 204 is installed on the hydraulic rod 103, and multiple side plates 203 are installed on the mounting plate 202. An extension plate 204 is installed on the hydraulic rod 103. The long plate 204 corresponds to two side plates 203, and the side plates 203 are located on both sides of the free end of the extension plate 204. There is a sliding cavity 205 for accommodating the extension plate 204 between the side plates 203. The side plates 203 are L-shaped, so that the width of the opening of the sliding cavity 205 is smaller than the width of other parts of the inner cavity of the sliding cavity 205. Blocks are installed on both sides of the free end of the extension plate 204. The width of the extension plate 204 is consistent with the width of the opening of the sliding cavity 205, and the width of the extension plate 204 where the blocks are installed is larger than the width of the opening of the sliding cavity 205. When the hydraulic rod 103 slides upward, the extension plate 204 is also driven to slide upward. When the extension plate 204 slides upward until the upper block thereof contacts the inner wall of the opening of the sliding cavity 205, the mounting plate 202 is driven to slide upward, and then the ejector rod 201 is driven to slide upward, so that the ejector rod 201 pushes the hairpin tube. During the whole process, the hydraulic rod 103 first pushes the movable mold 102 to open the mold, and then the ejector rod 201 pushes the hairpin tube out to separate it from the fixed mold 101, thereby increasing the feasibility of the device. The pulling clamp 3 is slidably mounted on the frame 1 along the second direction, and the pulling clamp 3 is used to clamp the hairpin tube to Figure 1 From the main viewing angle, the second direction is the horizontal direction. Since the fixed mold 101 and the movable mold 102 are opened and closed in the vertical direction, the hairpin tube is clamped and slid in the horizontal direction, so that the hairpin tube can be misaligned with the movable mold 102 and the fixed mold 101. Finally, the formed hairpin tube is unloaded and clamped by the manipulator, making the unloading of the device more convenient. Compared with the prior art, when in use, the hairpin tube raw material can be formed by injection molding through the cooperation between the fixed mold 101 and the movable mold 102. After molding is completed, the hydraulic rod 103 pushes the movable mold 102 and the fixed mold 101 to separate the molds, and the extension plate 204 slides in the sliding cavity 205. When the extension plate 204 slides to contact the side plate 203, the hydraulic rod 103 drives the ejector rod 201 to move so that the ejector rod 201 ejects the hairpin tube to the outside of the cavity of the fixed mold 101. Through the cooperation of the pulling clamp 3, the hairpin tube is pulled out from between the movable mold 102 and the fixed mold 101, so that the movable mold 102 and the fixed mold 101 will not block the hairpin tube, which is convenient for subsequent unloading by the robot.

[0021] like Figure 1, Figure 4 and Figure 11 As shown, a partial structure on the frame 1 is disclosed, a draw rod 4 is slidably mounted on the frame 1, a frame plate is mounted on the frame 1, a hole is opened on the frame plate, and the draw rod 4 is slidably inserted in the hole, so that the draw rod 4 can only slide on the frame 1 along its axis direction, so as to Figure 1 From the main perspective, the pull-out rod 4 slides on the frame 1 in the vertical direction, a gear 5 is rotatably installed on the frame 1, a plate body is installed on the frame plate, and the gear 5 is rotatably installed on the plate body. A first rack 6 meshing with the gear 5 is installed on the mounting plate 202, and a second rack 9 meshing with the gear 5 is installed on the pull-out rod 4. The first rack 6 and the second rack 9 are symmetrically arranged on both sides of the gear 5 and mesh with the gear 5. The two are connected by transmission through the gear 5, so that when the mounting plate 202 slides upward, the gear 5 is driven to rotate by the first rack 6, and then the second rack 9 is driven to slide downward by the rotation of the gear 5. A cavity 7 is opened on the ejector rod 201, and a sliding insert in the cavity 7 is installed on the pull-out rod 4. The piston rod 8 and the cavity 7 pass through the ejector rod 201, and the opening of the cavity 7 is located in the cavity of the fixed mold 101. The piston rod 8 is inserted in the cavity 7. When the piston rod 8 is inserted in the cavity 7, the end of the piston rod 8 is flush with the opening of the cavity 7, thereby shielding the opening of the cavity 7, reducing the possibility of the hairpin tube raw material entering the cavity 7. Lubricating oil is applied between the piston rod 8 and the inner wall of the cavity 7. Firstly, it is used to lubricate the sliding of the piston rod 8 and increase the smoothness of the sliding of the piston rod 8. Secondly, it can also play a role in liquid sealing the hairpin tube raw material, reducing the possibility of the raw material entering the gap between the two. Even if part of the raw material enters the lubricating oil, it can also play the role of a release agent, reducing the possibility of the piston rod 8 being restricted in sliding; When the device is processed, the hydraulic rod 103 pushes the movable mold 102 to open the mold. When opening the mold, the mounting plate 202 moves upward, and the gear 5 is driven to rotate through the first rack 6, and then the second rack 9 and the pull rod 4 are driven to move upward through the gear 5, causing the piston rod 8 to slide downward, so that negative pressure is generated in the cavity 7, and then when the ejector rod 201 pushes the hairpin tube, the suction force generated on the hairpin tube through the cavity 7 increases the stability of the hairpin tube on the ejector rod 201 in the process of being pushed out of the cavity of the fixed mold 101, thereby increasing the practicality of the device.

[0022] like Figure 2 , Figure 5 , Figure 8 , Figure 9 , Figure 10 and Figure 12As shown, a partial structure of the draw clamp 3 is disclosed. A positioning hole 105 is provided on the fixed mold 101, and a positioning post 104 for inserting into the positioning hole 105 is installed on the movable mold 102. When the movable mold 102 and the fixed mold 101 are clamped, through the insertion fit between the positioning post 104 and the positioning hole 105, the connection between the fixed mold 101 and the movable mold 102 becomes tighter. The draw clamp 3 includes a sliding plate 302 slidably mounted on the frame 1 through an electric slide rail 301. The electric slide rail 301 is a prior art, including structures such as a guide rail and a slider. The sliding plate 302 is mounted on the slider, so that the sliding plate 302 can be driven by the electric slide rail 301 to approach or move away from the fixed mold 101. Symmetrically hinged on the sliding plate 302 are semi-jaws 303. The end where the semi-jaws 303 are hinged to the sliding plate 302 is set as the hinged end. A cavity for accommodating the hairpin tube is formed between the two semi-jaws 303. A magnetic block 304 is installed at the free end of the semi-jaw 303. A driving rod 305 is slidably mounted on the sliding plate 302. An expansion rod 306 is hinged on the sliding plate 302. The free end of the expansion rod 306 is hinged to the driving rod 305. A pressure receiving plate 308 is installed on the semi-jaw 303. When the expansion rod 306 abuts against the positioning post 104, the driving rod 305 abuts against the pressure receiving plate 308 to make the semi-jaw 303 rotate. A magnetic block 304 is installed at the free end of one semi-jaw 303, and an iron block is installed on the other semi-jaw 303. By attracting the iron block with the magnetic block 304, the two semi-jaws 303 can be clamped together to hold the hairpin tube. And compared with the mutual attraction of the two magnetic blocks 304, the attraction of the magnetic block 304 to the iron block is weaker, which is convenient for ensuring that the two semi-jaws 303 can be separated when the driving rod 305 pushes it. And because the hairpin tube is lighter, even if the attraction is weak, it can still be clamped stably. A travel switch electrically connected to the electric slide rail 301 is installed on the frame 1, which is located above the movable mold 102. When the movable mold 102 moves upward to contact the travel switch, the travel switch is activated, causing the electric slide rail 301 to drive the sliding plate 302 to slide. Among them, when the expansion rod 306 is abutted and rotated by the positioning post 104, the rotation point is the hinge point between the expansion rod 306 and the sliding plate 302. The hinge point between the expansion rod 306 and the driving rod 305 is used to provide a moving space for the rotation of the expansion rod 306, reducing the possibility of the expansion rod 306 being stuck during rotation. When the device needs to clamp the hairpin tube, the sliding plate 302 is driven by the electric slide rail 301 to approach the fixed mold 101. During this process, when the sliding plate 302 moves below the moving mold 102, the telescopic rod 306 abuts against the positioning column 104, which causes the telescopic rod 306 to rotate, so that the telescopic rod 306 drives the driving rod 305 to slide. When the driving rod 305 slides to abut against the pressure receiving plate 308, it forces the free ends of the pressure receiving plate 308 to move away from each other, and makes the hinged ends of the half jaws 303 rotate towards the fixed mold 101 direction, thereby driving the free ends of the half jaws 303 to move away from each other, opening the half jaws 303. When the half jaws 303 accommodate the hairpin tube, since the hairpin tube is negatively adsorbed by the ejector rod 201, the hairpin tube can abut against the hinged ends of the half jaws 303, enabling the half jaws 303 to rotate and reset to complete the closing. When the half jaws 303 gradually rotate and approach each other, the magnetic block 304 attracts the iron block on the other half jaw 303, enabling the half jaws 303 to close smoothly and clamp the hairpin tube. At this time, the electric slide rail 301 drives the sliding plate 302 to reset. During this process, through the cooperation of the one-way structure, the highest point of the telescopic rod 306 is lower than the positioning column 104, so that the positioning column 104 will not affect the reset of the sliding plate 302. At this time, the moving mold 102 and the fixed mold 101 will not block the hairpin tube, which is convenient for the subsequent clamping and blanking of the hairpin tube by the manipulator, enabling the manipulator not to extend between the moving mold 102 and the fixed mold 101, facilitating the blanking of the device, and increasing the practicability of the device.

[0023] As Figure 8 shown, a partial structure on the half jaw 303 is disclosed. A cross plate 307 is installed on the half jaw 303. When the half jaw 303 contacts the hairpin tube, the cross plate 307 abuts against the hairpin tube. The cross plate 307 is installed at the hinged end of the half jaw 303, and the cross plate 307 is closer to the cavity between the half jaws 303 than the pressure receiving plate 308. When the half jaw 303 is driven by the driving rod 305 to rotate, the end of the cross plate 307 is further away from the hinge point of the half jaw 303, so that when the hairpin tube is about to abut against the half jaw 303, it will directly contact the end of the cross plate 307. Through the cross plate 307, the half jaw 303 forms a structure of a labor-saving lever at this time, which is convenient for the half jaw 303 to rotate and reset better. And the cross plate 307 is a straight plate, making the cavity inside the half jaws 303 not a complete circle. When the hairpin tube is clamped by the half jaws 303, it is abutted by the cross plate 307. Since the hairpin tube is made of plastic and can deform, the friction between the half jaws 303 and the hairpin tube is increased by the abutting method, increasing the stability of the half jaws 303 when clamping the hairpin tube and increasing the practicability of the device.

[0024] As Figure 7 and Figure 10As shown in the figure, a partial structure on the fixed mold 101 is disclosed. A limiting arc plate 10 is installed on the fixed mold 101. A receiving groove 11 for receiving the limiting arc plate 10 is provided on the moving mold 102. The limiting arc plate 10 is located on the side of the cavity of the fixed mold 101 away from the electric slide rail 301. The top of the limiting arc plate 10 is lower than the lowest position of the half-jaw 303. After the ejector rod 201 ejects the hairpin tube, the lower half of the hairpin tube is aligned with the limiting arc plate 10, and the upper half is aligned with the half-jaw 303. When the half-jaw 303 moves to contact the hairpin tube, if the negative pressure generated on the ejector rod 201 is not sufficient to stabilize the hairpin tube, the half-jaw 303 continues to contact and move the hairpin tube. When the hairpin tube moves to contact the limiting arc plate 10, the movement of the hairpin tube is restricted. At this time, the hairpin tube can stably contact the cross plate 307. And because the top of the limiting arc plate 10 is lower than the lowest end of the half-jaw 303, when the half-jaw 303 clamps and transports the hairpin tube, the limiting arc plate 10 will not affect the movement of the half-jaw 303, ensuring the feasibility of the device.

[0025] As Figure 2 , Figure 5 , Figure 8 , Figure 9 and Figure 12 As shown in the figure, the specific structure of the one-way structure is disclosed. A sliding groove 12 for receiving the driving rod 305 is provided on the sliding plate 302. The driving rod 305 is in contact with the inner wall of the sliding groove 12, so that the driving rod 305 can only slide on the sliding plate 302 in a straight line direction, increasing the stability of the driving rod 305 during sliding. The telescopic rod 306 is slidably connected to the driving rod 305. A groove is provided on the driving rod 305, and a plate body is slidably installed in the groove. The free end of the telescopic rod 306 is tightly hinged to the plate body. A shielding plate 25 in contact with the rod body of the telescopic rod 306 is installed on the sliding plate 302. When the telescopic rod 306 is in a normal state, the shielding plate 25 is in contact with the side of the telescopic rod 306 facing the fixed mold 101. Through the shielding of the shielding plate 25, the end of the telescopic rod 306 hinged to the plate body on the driving rod 305 can only rotate in the direction close to the fixed mold 101 in the normal state. When performing subsequent reset, when the telescopic rod 306 rotates to contact the shielding plate 25, the rod body of the telescopic rod 306 is in the vertical direction; A connecting spring 13 is installed between the inner wall of the sliding groove 12 and the driving rod 305. A resisting spring 14 is installed on the driving rod 305. An arc-shaped block 15 is installed at the free end of the resisting spring 14. A plurality of arc-shaped grooves 16 for accommodating the arc-shaped block 15 are formed in the sliding groove 12. A cross bar 309 for resisting the telescopic rod 306 is installed on the frame 1. A hole is formed in the driving rod 305, and the resisting spring 14 is installed in the hole. The arc-shaped block 15 is slidably connected to the driving rod 305 along the radial direction of the driving rod 305, and the driving rod 305 slides along its own axial direction. When the device is in a normal state, the arc-shaped block 15 is inserted into the arc-shaped groove 16 to limit the sliding of the driving rod 305. The driving rod 305 is completely located in the sliding groove 12 and has an initial distance from the semi-jaw 303. The end of the groove on the driving rod 305 close to the fixed mold 101 is set as the moving end, and the end far from the fixed mold 101 is set as the initial end. In the normal state, the plate body is located on the initial end, and the distance between the initial end and the moving end is the same as the above initial distance. There are two arc-shaped grooves 16. The one close to the fixed mold 101 is set as the first groove, and the one far from the fixed mold 101 is set as the second groove. In the normal state, the arc-shaped block 15 is located in the second groove, and the distance between the first groove and the second groove is also the same as the initial distance; Wherein, a concave groove 22 is formed at the initial end in the groove on the driving rod 305. A hole is formed in the plate body, a reset spring 23 is installed in the hole, and a positioning convex block 24 is installed at the end of the spring. The free end of the positioning convex block 24 is arc-shaped. When the plate body is located at the initial end, the positioning convex block 24 is inserted into the concave groove 22 to limit the sliding of the plate body. The elastic coefficient of the reset spring 23 is greater than that of the resisting spring 14, so that when the two are stressed simultaneously, the resisting spring 14 will deform first; When the sliding plate 302 slides to the position where the telescopic rod 306 abuts against the positioning column 104, the abutting force generated by the rigid abutment between the two forces the end of the telescopic rod 306 hinged to the plate body to have a tendency to move towards the outlet direction of the sliding groove 12, and forces the reset spring 23 to deform through the guiding of the arc surface of the positioning convex block 24, resulting in the separation of the positioning convex block 24 from the concave groove 22, enabling the sliding of the plate body to resume. As a result, the plate body first slides from the initial end to the moving end. When the plate body slides to the moving end, the telescopic rod 306 continues to be abutted and rotated by the positioning column 104, so that the driving rod 305 is pushed to abut against the semi-jaw 303. Because this abutting force can deform the reset spring 23, and the elastic coefficient of the reset spring 23 is greater than that of the resisting spring 14, it is certain that the resisting spring 14 can be deformed. Therefore, during the process, the arc-shaped block 15 can be guided by its arc surface, moving outside the second groove and passing through the first groove, enabling the driving rod 305 to slide smoothly to abut against the semi-jaw 303. When the driving rod 305 abuts against the semi-jaw 303, the arc-shaped block 15 is outside the first groove and is closer to the opening of the sliding groove 12 compared with the first groove; After the semi-jaw 303 is pushed open and abutted, the sliding plate 302 continues to move. At this time, since the abutment between the positioning post 104 and the telescopic rod 306 is released, the driving rod 305 is pulled back by the connecting spring 13, so that the end of the driving rod 305 does not contact the semi-jaw 303. At this time, since the distance between the initial end and the moving end is the same as the initial distance, the driving rod 305 only slides in the horizontal direction at this time and does not drive the telescopic rod 306 to rotate. Therefore, the telescopic rod 306 can maintain an inclined state. During the reset process of the driving rod 305, the arc-shaped block 15 will first pass through the first groove and be inserted into the first groove, so that the distance between the semi-jaw 303 and the driving rod 305 is the initial distance. Therefore, after the semi-jaw 303 is reset, it will not abut against the driving rod 305 and the driving rod 305 will not block the reset of the semi-jaw 303. Since the force received by the driving rod 305 at this time is only the pulling force for the reset of the connecting spring 13, it is not enough to separate the arc-shaped block 15 from the first groove and limit the sliding of the driving rod 305. Since the telescopic rod 306 can maintain an inclined state and its highest position is always lower than the positioning post 104, the positioning post 104 will not affect the reset of the sliding plate 302. When the sliding plate 302 is reset, when the sliding plate 302 moves to the initial position, the telescopic rod 306 abuts against the cross bar 309 and rotates, driving the plate body to slide towards the initial end and making the positioning convex block 24 inserted into the concave groove 22. At this time, the telescopic rod 306 has not been completely reset. Since the elastic coefficient of the reset spring 23 is greater than that of the abutment spring 14, during the process of the cross bar 309 continuously abutting and rotating the telescopic rod 306 until it contacts the shielding plate 25, the plate body hinged to it also abuts against the inner wall of the initial end. Through the rigid abutment of the cross bar 309, the abutment spring 14 is forced to deform, so that the arc-shaped block 15 is separated from the first groove and is pulled by the connecting spring 13 to be inserted into the second groove to complete the reset; When the telescopic rod 306 is between the moving die 102 and the fixed die 101, it continues to maintain an inclined state, which not only facilitates the subsequent reset of the sliding plate 302, but also enables the telescopic rod 306 not to contact the moving die 102 and block the sliding when the sliding plate 302 slides between the moving die 102 and the fixed die 101, improving the feasibility of the device; During the process, after the abutment spring 14 deforms, the driving rod 305 can slide in the sliding groove 12. Before this, because the driving rod 305 is inserted into the arc-shaped groove 16 through the arc-shaped block 15, the sliding groove 12 blocks the sliding of the driving rod 305. The existence of resistance enables the telescopic rod 306 to generate abutment when it contacts the cross bar 309. When the driving rod 305 slides back to its original position, the shielding of the sliding groove 12 to the sliding of the driving rod 305 is released, and the reset spring 23 and the cross bar 309 are only in contact, so that the reset spring 23 will not deform, improving the feasibility of the device.

[0026] As shown Figure 12 in the figure, the specific structure of the telescopic rod 306 is disclosed. An extension rod 17 is installed on the telescopic rod 306. The telescopic rod 306 abuts against the positioning column 104 through the extension rod 17. The distance from the free end of the extension rod 17 to the hinge point is greater than the distance between the hinge end of the telescopic rod 306 and the drive rod 305 to the hinge point. A first inclined surface is provided on the extension rod 17, and a second inclined surface parallel to the first inclined surface is provided on the positioning column 104 opposite to the extension rod 17. The telescopic rod 306 itself does not abut against the positioning column 104, but contacts the positioning column 104 through the extension rod 17 installed thereon. When the extension rod 17 abuts against the positioning column 104, through the guidance of the first inclined surface and the second inclined surface, the extension rod 17 can rotate better, and the force application point of the telescopic rod 306 is extended through the extension rod 17, so that the distance from the force application point of the telescopic rod 306 to the rotation point is greater than the distance from the hinge point of the drive rod 305 and the telescopic rod 306 to the rotation point, making the telescopic rod 306 a labor-saving lever. By sliding the sliding plate 302 and abutting against the positioning column 104, the telescopic rod 306 can rotate better, increasing the feasibility of the device.

[0027] As shown Figure 3 in the figure, part of the structure on the frame 1 is disclosed. A lifting plate 18 is installed on the frame 1. The lifting plate 18 is flush with the track surface of the electric slide rail 301. Plates are installed on both sides of the lifting plate 18. Track grooves are also provided on the lifting plate 18 and the plates. The lifting plate 18 can be regarded as an extension of the guide rail of the electric slide rail 301. An inclined plate 19 is installed on the lifting plate 18. The inclined surface of the inclined plate 19 faces the fixed mold 101. An empty groove is provided at the bottom of the sliding plate 302. The width of the empty groove is greater than or equal to that of the inclined plate 19, so that when the sliding plate 302 moves above the inclined plate 19, the inclined plate 19 is accommodated through the empty groove, and the inclined plate 19 will not block the sliding of the sliding plate 302; When the sliding plate 302 resets, since the semi-jaw 303 clamps the upper half of the hairpin tube, the lower half is closer to the lifting plate 18. When the sliding plate 302 resets to contact the inclined plate 19, it is guided by the inclined surface of the inclined plate 19, so that the hairpin tube can move upward between the semi-jaws 303, and the upper end of the hairpin tube can be more exposed outside the semi-jaws 303, facilitating the subsequent clamping by the manipulator and increasing the practicality of the device.

[0028] As shown Figure 8As shown, a partial structure on the semi-jaw 303 is disclosed. A contact rod 20 that penetrates the semi-jaw 303 is slidably installed on the semi-jaw 303. The contact rod 20 is used to contact the hairpin tube. A pulling spring 21 is installed between the contact rod 20 and the semi-jaw 303. The pulling spring 21 forces the contact rod 20 to move into the cavity of the semi-jaw 303 and contact the hairpin tube. The pulling spring 21 is a light spring with a small spring coefficient, and the force exerted by the pulling spring 21 is small, which is used to increase the friction between the semi-jaw 303 and the hairpin tube. The main clamping force for the semi-jaw 303 to clamp the hairpin tube comes from the contact caused by the cross plate 307 to the hairpin tube. The contact rod 20 only plays an auxiliary fixing role. During the process, the direction of the contact of the contact rod 20 with the hairpin tube is perpendicular to the direction of the contact of the cross plate 307 with the hairpin tube, so that the hairpin tube is contacted at multiple points between the semi-jaws 303, increasing the clamping strength of the semi-jaw 303 on the hairpin tube and the stability of the hairpin tube during transportation. And because the contact force between the contact rod 20 and the hairpin tube is small, it reduces the difficulty of the hairpin tube being pushed by the inclined plate 19 and the subsequent clamping of the hairpin tube by the manipulator, increasing the feasibility of the device.

[0029] As Figure 14 shown, the present invention also discloses an operating method for a hairpin tube forming device, which is applicable to the hairpin tube forming device of any of the above. In some embodiments, it includes the following steps: S1. Inject the hairpin tube raw material through the injection hole on the moving mold 102 between the fixed mold 101 and the moving mold 102 for injection molding. S2. When the hairpin tube is formed, use the hydraulic rod 103 to push the moving mold 102 to open the mold. During the process, when the opening arc passes through the ejector rod 201, the hairpin tube is pushed out. S3. Drive the sliding plate 302 to approach the fixed mold 101 through the electric slide rail 301, and use the semi-jaw 303 to clamp the formed hairpin tube. S4. After the semi-jaw 303 clamps the hairpin tube, the electric slide rail 301 drives the hairpin tube to move outside the moving mold 102 and the fixed mold 101 for blanking.

[0030] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A hairpin tube forming device, characterized in that Comprising: A frame (1) on which a fixed mold (101) and a movable mold (102) are installed, and the movable mold (102) is slidably installed on the fixed mold (101) along a first direction by a hydraulic rod (103); An ejection structure (2) installed on the frame (1), the ejection structure (2) includes a mounting plate (202) slidably installed on the frame (1), an ejection rod (201) is installed on the mounting plate (202), the ejection rod (201) penetrates the fixed mold (101) and is located in the cavity of the fixed mold (101), an extension plate (204) is installed on the hydraulic rod (103), and a plurality of side plates (203) are installed on the mounting plate (202), and there is a sliding cavity (205) for accommodating the extension plate (204) between the side plates (203); A draw clamp (3) slidably installed on the frame (1) along a second direction, and the draw clamp (3) is used for clamping a hairpin tube.

2. The hairpin tube forming device according to claim 1, wherein, A draw rod (4) is slidably installed on the frame (1), a gear (5) is rotatably installed on the frame (1), a first rack (6) meshing with the gear (5) is installed on the mounting plate (202), a second rack (9) meshing with the gear (5) is installed on the draw rod (4), a cavity (7) is formed in the ejection rod (201), and a piston rod (8) slidably inserted into the cavity (7) is installed on the draw rod (4).

3. The hairpin tube forming device according to claim 2, characterized in that, A positioning hole (105) is formed in the fixed mold (101), a positioning post (104) for being inserted into the positioning hole (105) is installed on the movable mold (102), the draw clamp (3) includes a sliding plate (302) slidably installed on the frame (1) through an electric slide rail (301), semi-claw jaws (303) are symmetrically hinged on the sliding plate (302), a magnetic block (304) is installed at the free end of the semi-claw jaws (303), a driving rod (305) is slidably installed on the sliding plate (302), a telescopic rod (306) is hinged on the sliding plate (302), the free end of the telescopic rod (306) is hinged to the driving rod (305), a pressure receiving plate (308) is installed on the semi-claw jaws (303), when the telescopic rod (306) abuts against the positioning post (104), the driving rod (305) abuts against the pressure receiving plate (308) to make the semi-claw jaws (303) rotate, and a one-way structure is arranged on the sliding plate (302) so that when the driving rod (305) slides back to its original position, the height of the telescopic rod (306) is lower than the height of the positioning post (104).

4. The hairpin tube forming device according to claim 3, characterized in that, A cross plate (307) is installed on the semi-claw jaws (303), and when the semi-claw jaws (303) contact the hairpin tube, the cross plate (307) abuts against the hairpin tube.

5. The hairpin tube forming device according to claim 4, wherein A limiting arc plate (10) is installed on the fixed mold (101), a receiving groove (11) for accommodating the limiting arc plate (10) is formed in the movable mold (102), and the limiting arc plate (10) is located on the side of the cavity of the fixed mold (101) away from the electric slide rail (301).

6. The hairpin tube forming device according to claim 5, characterized in that, The one-way structure includes a sliding groove (12) formed in the sliding plate (302) for accommodating a driving rod (305). The telescopic rod (306) is slidably connected to the driving rod (305). A connecting spring (13) is installed between the inner wall of the sliding groove (12) and the driving rod (305). A resisting spring (14) is installed on the driving rod (305), and an arc-shaped block (15) is installed at the free end of the resisting spring (14). A plurality of arc-shaped grooves (16) for accommodating the arc-shaped block (15) are formed in the sliding groove (12). A cross bar (309) for resisting the telescopic rod (306) is installed on the frame (1).

7. The hairpin tube forming device according to claim 6, characterized in that, An extension rod (17) is installed on the telescopic rod (306). The telescopic rod (306) abuts against the positioning column (104) through the extension rod (17). The distance from the free end of the extension rod (17) to the hinge point is greater than the distance between the hinge end of the telescopic rod (306) and the driving rod (305) to the hinge point.

8. The hairpin tube forming device according to claim 7, wherein, A lifting plate (18) is installed on the frame (1). The lifting plate (18) is flush with the track surface of the electric slide rail (301). An inclined plate (19) is installed on the lifting plate (18), and the inclined surface of the inclined plate (19) faces the fixed mold (101).

9. The hairpin tube forming device according to claim 8, characterized in that, A resisting rod (20) penetrating through the half-jaw (303) is slidably installed on the half-jaw (303). The resisting rod (20) is used to abut against the hairpin tube. A pulling spring (21) is installed between the resisting rod (20) and the half-jaw (303).

10. A method for operating a hairpin tube forming device, applicable to the hairpin tube forming device described in any one of the above-mentioned claims 1-9, characterized in that, It includes the following steps: S1. Inject the hairpin tube raw material between the fixed mold (101) and the movable mold (102) for injection molding. S2. When the hairpin tube is formed, the movable mold (102) is pushed by the hydraulic rod (103) to open the mold. During the process, the hairpin tube is also pushed out by the ejector rod (201). S3. Drive the sliding plate (302) to approach the fixed mold (101) through the electric slide rail (301), and clamp the formed hairpin tube with the half-jaw (303). S4. After the half-jaw (303) clamps the hairpin tube, the electric slide rail (301) drives the hairpin tube to move to the outside of the movable mold (102) and the fixed mold (101) for blanking.

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