Material strap puller

Abstract

The utility model relates to a material strap puller which is provided with a lower die fixing seat and a sliding block, the upper end of the lower die fixing seat is provided with a front-back through material passing channel, a cover plate is assembled above the material passing channel, the cover plate and the lower die fixing seat cooperate together to guide a material strap in the material passing channel to move, the feeding problem caused by warping of the material strap is avoided, and it is guaranteed that material pulling is stable and smooth. The sliding block is assembled in the lower die fixing base and can slide in the moving direction of the material belt. The sliding block is provided with a material pulling hook, a driving part and a reset part. The material pulling hook is used for clamping a material pulling hole preset in a material belt, and the reset part drives the sliding block to slide forwards in an elastic reset mode to pull the material belt to move. Under the action of an external punch, the driving part enables the sliding block to slide backwards, the reset part accumulates force, and the material pulling hook is connected with the pulled material in a clamping mode again. The sliding block is matched with the punch, so that the sliding block drives the material pulling hook to repeatedly pull materials, the material pulling operation is stable, impact and shaking are reduced, and noise is low. The whole structure is simple and reasonable, manufacturing, dismounting and maintenance are convenient, and the service life is long.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding equipment, in particular to a material puller used for material belt feeding. Background Art

[0002] The pulling machine pulls the stamped terminal into the injection mold and then pulls it out after the injection is completed. At present, most of the pulling actions are to use a cylinder to drive the positioning pin to pass through the hole of the terminal, and then use another cylinder to shift to complete the pulling action. After pulling in place, the cylinder that drives the positioning pin returns to its position, and then the shifting cylinder returns to its position to complete a cycle.

[0003] The disadvantages of this cylinder pulling mode are: 1. The stamped terminal strip sometimes has a certain degree of warping. In this case, there is a risk that the positioning pin cannot be inserted into the terminal strip hole, and the pulling is abnormal; sometimes the positioning pin can also be inserted into the strip, but the warped terminal does not move smoothly in the flow channel, and the resistance is large, causing the positioning pin to deform or break due to lateral force. 2. The displacement cylinder has a STOP block at the end of the required stroke for positioning. The moving cylinder rod hits the STOP block and stops suddenly. This impact force will cause jitter. The current method to reduce this impact is to install a buffer, but this can only slow down the impact. There are often jitters and inaccurate positioning. Especially in some places, due to limited space, buffers cannot be installed. At this time, it is a head-on collision, and the jitter and noise are both large. Summary of the invention

[0004] The utility model aims to provide a material belt puller, which can realize the stable pulling of the material belt without generating the phenomenon of impact and shaking and with low noise.

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

[0006] A strip puller having:

[0007] A lower die fixing seat, wherein an activity space is provided inside the lower die fixing seat, and a material transfer channel is provided at the upper end of the lower die fixing seat, and a cover plate is assembled above the material transfer channel, and the cover plate cooperates with the lower die fixing seat to guide the movement of the material strip in the material transfer channel;

[0008] The slider is assembled in the movable space of the lower mold fixing seat and can slide along the moving direction of the material belt; the slider is provided with a pulling hook, a driving part and a resetting part; the pulling hook is used to clamp the preset pulling hole on the material belt, and the pulling hook is designed to be a one-way clamping form; the resetting part drives the slider to slide forward by elastic resetting, so that the pulling hook clamps the pulling hole of the material belt and pulls the material belt to move; the driving part slides the slider backward under the action of an external punch, allowing the resetting part to accumulate force, and the pulling hook follows the slider to slide to the pulling hole at the corresponding spatial position on the material belt, so as to clamp the pulling material again.

[0009] The above scheme is further that the driving part includes an extension arm and a roller, one end of the extension arm is fixed on the slider, the other end of the extension arm extends from a first guide long hole preset on the lower mold fixing seat, and the roller is installed on the extended end of the extension arm; the length direction of the first guide long hole is the same as the sliding direction of the slider, the punch moves up and down in a direction perpendicular to the length direction of the first guide long hole, and the lower end of the punch is provided with a driving inclined surface, which drives the slider to slide by squeezing the roller by the driving inclined surface.

[0010] The above scheme is further that the reset part includes a reset rod and a compression spring, the reset rod extends backward from the slider and passes through the lower mold fixing seat, the compression spring is sleeved on the reset rod, and the two ends of the compression spring respectively support the slider and the lower mold fixing seat.

[0011] The above scheme is further that the lower die fixing seat adopts a horizontal design, the material transfer channel is a profile groove at the upper end of the lower die fixing seat, and the activity space is located at the lower side of the material transfer channel and is connected to the material transfer channel; a pad is provided on the inner bottom of the activity space, and the pad receives the slider and guides the movement of the slider; the pulling hooks are distributed on the left and right sides of the sliding direction of the slider and are arranged in pairs, the pulling hook protrudes from bottom to top, and a guide inclined surface is provided on the rear side of the hook head of the pulling hook, so that the pulling hook can jam the pulling hole when moving forward, and slide out of the pulling hole automatically when moving backward.

[0012] The above scheme is further that a middle support plate is provided at the upper end of the left and right side walls of the material transfer channel, and the two middle support plates are symmetrically arranged. The middle support plates support the material belt, and the middle support plates have a floating platform portion protruding toward the material transfer channel, and a second guide long hole is provided on the floating platform portion, and the pulling hook protrudes through the second guide long hole and extends into the pulling hole of the material belt.

[0013] The above scheme is further that a positioning tooth is also provided on the lower mold fixing seat, and the positioning tooth is used to extend into the pulling hole of the material strip to establish the positioning state of the material strip; the positioning tooth is arranged behind the pulling hook, and is located on the same side of the material passing channel. The positioning tooth and the pulling hook are in the same straight line, and the positioning tooth is designed as a one-way clamping form, so that when the pulling hook pulls the material, the material strip can slide over the positioning tooth.

[0014] Further, the cushion block is provided with a guiding groove, the extending direction of the guiding groove is consistent with the sliding direction of the sliding block, and the sliding block is provided with a guiding block extending into the guiding groove.

[0015] Further, a guiding wall is vertically arranged on the outer side of the lower die fixing seat, and the punch is aligned by abutting the corresponding vertical surface of the guiding wall against the punch.

[0016] By adopting the above technical means, the cover plate and the lower die fixing seat cooperate to guide the movement of the strip in the feeding channel, avoiding the feeding problem caused by the warping of the strip, ensuring smooth and stable material pulling; and adopting the cooperation of the sliding block and the punch, the sliding block drives the material pulling hook to perform repeated material pulling work, the material pulling operation is stable, the impact and vibration are reduced, and the noise is small. The overall structure is simple and reasonable, convenient for manufacturing, disassembly and maintenance, mechanically driven, and has a long service life. Brief Description of the Drawings

[0017] Attached Figure 1 is a schematic structural diagram of an embodiment of the present invention;

[0018] Attached Figure 2 is Figure 1 a schematic exploded view of the structure of the embodiment;

[0019] Attached Figure 3 is Figure 1 a schematic partial structure diagram of the embodiment;

[0020] Attached Figure 4 is Figure 3 a schematic diagram of the strip implanted in the embodiment;

[0021] Attached Figure 5 is a schematic structural diagram of the material pulling hook of the present invention. Detailed Description of the Embodiment

[0022] The following will further illustrate the concept, specific structure and technical effects of the present invention with reference to the drawings, so as to fully understand the purpose, features and effects of the present invention.

[0023] It should be noted that in the description of the present invention, the terms indicating the direction or position relationship such as "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the direction or position relationship shown in the drawings. This is only for convenience of description, rather than indicating or implying that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0024] Refer to Figure 1 、 2As shown in Figures 3, 4, and 5, they are schematic diagrams of the preferred embodiments of the present utility model. The present utility model relates to a strip pulling device, which has: a lower die fixing base 1, a slider 4, and a punch 5. The lower die fixing base 1 and the punch 5 are installed on corresponding production equipment, and the punch 5 is located above the lower die fixing base 1 and can move up and down. In actual production, the punch 5 can be connected to a corresponding lifting seat and driven by a cylinder, an oil cylinder, a motor, etc. to meet the working requirements of the punch 5. An activity space 11 is provided inside the lower die fixing base 1, and a through-feed channel 12 that penetrates from front to back is provided at the upper end of the lower die fixing base 1. A cover plate 2 is assembled above the through-feed channel 12, and the cover plate 2 and the lower die fixing base 1 cooperate to guide the movement of the strip 3 in the through-feed channel 12. In this embodiment, the cover plate 2 and the lower die fixing base 1 form an up-and-down clamping method to restrict the strip 3, so that the strip 3 can move smoothly, accurately, and smoothly from the through-feed channel 12, avoiding feeding problems caused by strip warping. The slider 4 is assembled in the activity space 11 of the lower die fixing base 1 and can slide along the moving direction of the strip 3. The slider 4 is provided with a pulling hook 41, a driving part 42, and a reset part 43. The pulling hook 41 is used to engage with a preset pulling hole 31 on the strip 3, and the pulling hook 41 is designed in a one-way engagement form. The reset part 43 drives the slider 4 to slide forward through an elastic reset method, so that the pulling hook 41 catches the pulling hole 31 of the strip 3 and pulls the strip 3 to move. The driving part 42, under the action of the external punch 5, makes the slider 4 slide backward, so that the reset part 43 stores energy, and the pulling hook 41 follows the slider 4 to slide to the pulling hole 31 at the corresponding space position on the strip 3 for re-engaging and pulling.

[0025] In this embodiment, the driving part 42 includes an extension arm 421 and a roller 422. One end of the extension arm 421 is fixed on the slider 4, and the other end of the extension arm 421 extends out from a preset first guiding long hole 13 on the lower die fixing base 1. The roller 422 is installed on the extending end of the extension arm 421. Figure 1 、 2 As shown in Figures 3 and 4, extension arms 421 symmetrically extend out from the left and right sides of the lower die fixing base 1. The extension arms 421 on both sides are constructed by the same shaft rod, with stable and reliable structure. The left and right sides of the lower die fixing base 1 are synchronously driven, making the movement of the lower die fixing base 1 stable and reliable. The length direction of the first guiding long hole 13 is the same as the sliding direction of the slider 4. The first guiding long hole 13 provides a moving space for the extension arm 421 and guides the movement of the extension arm 421. The punch 5 moves up and down in a direction perpendicular to the length direction of the first guiding long hole 13, and a driving inclined surface 51 is provided at the lower end of the punch 5. The roller 422 is driven by the driving inclined surface 51 to drive the slider 4 to slide, so that the slider 4 slides backward, making the reset part 43 store energy, and the pulling hook 41 follows the slider 4 to slide to the pulling hole 31 at the corresponding space position on the strip 3 for re-engaging and pulling.

[0026] Figure 2 、3 As shown, in this embodiment, the reset part 43 includes a reset rod 431 and a compression spring 432. The reset rod 431 extends backward from the slider 4 and passes through the lower die fixing seat 1. The compression spring 432 is sleeved on the reset rod 431. The two ends of the compression spring 432 respectively support the slider 4 and the lower die fixing seat 1. When the slider 4 slides backward, the reset rod 431 moves backward with it. At this time, the compression spring 432 is compressed and stored between the slider 4 and the lower die fixing seat 1. At the same time, the material drawing hook 41 follows the slider 4 to slide to the material drawing hole 31 at the corresponding spatial position on the material belt 3 and engages. Then the punch 5 withdraws and releases the roller 422. Under the action of the compression spring 432, the slider 4 moves forward, and the material drawing hook 41 clamps the material drawing hole 31 of the material belt 3 and pulls the material belt 3 to move, so as to achieve the feeding work. Such actions are repeated to cooperate with the production feeding.

[0027] In this embodiment, the lower die fixing seat 1 adopts a horizontal design, and the material transfer channel 12 is a groove at the upper end of the lower die fixing seat 1, which provides corresponding avoidance space to meet the passage of the material belt. The structure is simple and convenient to manufacture and assemble. In this embodiment, the upper ends of the left and right side walls of the material transfer channel 12 are provided with middle support plates 7, and the two middle support plates 7 are symmetrically arranged. The middle support plates 7 and the cover plate 2 are locked on the lower die fixing seat 1 by bolts, which is convenient for replacement and maintenance. The middle support plate 7 supports the material belt 3, and the middle support plate 7 has a floating platform portion protruding toward the material transfer channel 12, and a second guide long hole 71 is provided on the floating platform portion. The pull hook 41 protrudes through the second guide long hole 71 and extends into the pull hole 31 of the material belt. The second guide long hole 71 provides a movement space for the pull hook 41 and effectively guides the movement of the pull hook 41. The activity space 11 is located at the lower side of the material transfer channel 12 and is connected to the material transfer channel 12, which is convenient for assembling the slider. In this embodiment, a cushion block 6 is provided at the inner bottom of the activity space 11, and the cushion block 6 receives the slider 4 and guides the slider 4 to move, thereby increasing the assembly structure and movement stability of the slider. The material pulling hooks 41 are distributed on the left and right sides of the sliding direction of the slider 4 and are arranged in pairs. The material pulling hooks 41 protrude from bottom to top, and a guide inclined surface 411 ( Figure 5 As shown in the figure), the material pulling hook 41 can clamp the material pulling hole 31 when it moves forward, and the material pulling hook 41 can slide out of the material pulling hole 31 when it moves backward, so as to meet the requirements of pulling the material belt and sliding.

[0028] Figure 2 , 3, as shown in FIGS. 4, in this embodiment, a positioning tooth 14 is further provided on the lower die fixing base 1. The positioning tooth 14 is used to extend into the pulling hole 31 of the strip to establish the strip positioning state; the positioning tooth 14 is arranged behind the pulling hook 41 and is located on the same side of the material passing channel 12. The positioning tooth 14 and the pulling hook 41 are on the same straight line. The positioning tooth 14 is designed in a one-way clamping form, so that when the pulling hook 41 pulls the material, the strip can slide past the positioning tooth 14. The positioning tooth 14 is used to prevent the strip from retreating, ensure accurate feeding, contribute to the pulling hook 41 to catch and pull the material again, and also contribute to improving the production quality. In this embodiment, the positioning tooth 14 is an insert embedded in the lower die fixing base 1, with a simple structure, convenient for manufacturing and maintenance.

[0029] Figure 2 , as shown in FIGS., in this embodiment, a guiding groove 61 is provided on the cushion block 6. The extending direction of the guiding groove 61 is consistent with the sliding direction of the slider. The slider 4 is provided with a guiding block 44 extending into the guiding groove 61. This structure further improves the moving smoothness and accuracy of the slider 4 and improves the working precision of the pulling operation.

[0030] Figure 1 , 2 , as shown in FIGS. 3 and 4, in this embodiment, a guiding wall 15 is vertically provided on the outer side of the lower die fixing base 1. The guiding wall 15 is abutted against the corresponding vertical surface of the punch 5 to guide the punch 5, so that the punch 5 is pressed down stably and accurately, which is beneficial to pushing the roller 422 to drive the slider 4 to slide. The roller 422 has self-rotatability and rolls in contact with the punch 5, reducing hard friction, meeting the requirements of smooth pulling operation, and extending the service life.

[0031] The utility model adopts the cooperation of the cover plate and the lower die fixing base to guide the movement of the strip in the material passing channel, avoiding the feeding problems caused by strip warping, ensuring smooth and stable pulling; and adopts the cooperation of the slider and the punch to realize the slider driving the pulling hook to perform repeated pulling operations, with stable pulling operation, reduced impact and vibration, and low noise. The overall structure is simple and reasonable, convenient for manufacturing, disassembly and maintenance, with mechanical transmission and long service life.

[0032] Of course, the above has described the present utility model in detail in combination with the embodiments, only to illustrate the technical concept and characteristics of the present utility model. The purpose is to enable those who are familiar with this technology to understand the content of the present utility model and implement it. Therefore, all equivalent changes or modifications made according to the spirit of the present utility model should be covered within the protection scope of the present utility model.

Claims

1. Tape pulling device, characterized in that, comprising: a lower die fixing base (1), an activity space (11) is provided inside the lower die fixing base (1), and a material passing channel (12) penetrating through from front to back is provided at the upper end of the lower die fixing base (1). A cover plate (2) is assembled above the material passing channel (12), and the cover plate (2) and the lower die fixing base (1) cooperate to guide the movement of the strip (3) in the material passing channel (12); a slider (4) assembled in the activity space (11) of the lower die fixing base (1) and capable of sliding along the moving direction of the strip (3); the slider (4) is provided with a material pulling hook (41), a driving part (42) and a reset part (43); the material pulling hook (41) is used for clamping a preset material pulling hole (31) on the strip (3), and the material pulling hook (41) is designed in a one-way clamping form; the reset part (43) drives the slider (4) to slide forward through an elastic reset manner, so that the material pulling hook (41) clamps the material pulling hole (31) of the strip (3) and pulls the strip (3) to move; the driving part (42) makes the slider (4) slide backward under the action of an external punch (5), so that the reset part (43) stores energy, and the material pulling hook (41) slides to the material pulling hole (31) at the corresponding space position on the strip (3) following the slider (4) for clamping and pulling the material again.

2. The tape pulling device according to claim 1, characterized in that, The driving part (42) includes an extension arm (421) and a roller (422). One end of the extension arm (421) is fixed on the slider (4), and the other end of the extension arm (421) extends out from a preset first guiding long hole (13) on the lower die fixing base (1). The roller (422) is installed at the extending end of the extension arm (421); the length direction of the first guiding long hole (13) is the same as the sliding direction of the slider (4). The punch (5) moves up and down in a direction perpendicular to the length direction of the first guiding long hole (13), and a driving inclined surface (51) is provided at the lower end of the punch (5). The slider (4) is driven to slide by squeezing the roller (422) through the driving inclined surface (51).

3. The tape pulling device according to claim 1, characterized in that, The reset part (43) includes a reset rod (431) and a compression spring (432). The reset rod (431) extends backward from the slider (4) and passes through the lower die fixing base (1). The compression spring (432) is sleeved on the reset rod (431), and both ends of the compression spring (432) respectively support against the slider (4) and the lower die fixing base (1).

4. The tape pulling device according to claim 1, wherein The lower die fixing base (1) adopts a horizontal design. The material passing channel (12) is a grooved channel on the upper end of the lower die fixing base (1). The activity space (11) is located on the lower side of the material passing channel (12) and is communicated with the material passing channel (12); a cushion block (6) is provided at the inner bottom of the activity space (11), and the cushion block (6) supports the slider (4) and guides the movement of the slider (4); the material pulling hooks (41) are distributed on the left and right sides in the sliding direction of the slider (4) and are arranged in pairs. The material pulling hooks (41) protrude upward from the bottom, and a guiding inclined surface (411) is provided at the rear side of the hook head of the material pulling hook (41), so that the material pulling hook (41) can clamp the material pulling hole (31) when moving forward, and can slide out of the material pulling hole (31) adaptively when moving backward.

5. The tape pulling device according to claim 4, characterized in that, Upper ends of left and right side walls of the material passing channel (12) are respectively provided with middle supporting plates (7). The two middle supporting plates (7) are symmetrically arranged. The middle supporting plates (7) support the material tape (3). The middle supporting plates (7) have a floating platform portion protruding towards the material passing channel (12), and a second guiding long hole (71) is provided on the floating platform portion. The material pulling hook (41) protrudes through the second guiding long hole (71) and extends into the material pulling hole (31) of the material tape.

6. The tape pulling device according to claim 1, characterized in that The lower die fixing base (1) is further provided with positioning teeth (14). The positioning teeth (14) are used to extend into the material pulling hole (31) of the material tape to establish a material tape positioning state. The positioning teeth (14) are arranged behind the material pulling hook (41). The positioning teeth (14) and the material pulling hook (41) on the same side of the material passing channel (12) are on the same straight line. The positioning teeth (14) are designed in a one-way clamping form, so that when the material pulling hook (41) pulls the material, the material tape can slide past the positioning teeth (14).

7. The tape pulling device according to claim 4, characterized in that, The cushion block (6) is provided with a guiding groove (61). The extending direction of the guiding groove (61) is consistent with the sliding direction of the slider. The slider (4) is provided with a guiding block (44) extending into the guiding groove (61).

8. The tape pulling device according to claim 2, wherein, The outer side of the lower die fixing base (1) is provided with a vertically arranged guiding wall (15). The punch (5) is guided by abutting the corresponding vertical surface of the guiding wall (15) against the punch (5).

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