A slider locking mechanism of an injection mold

Abstract

The utility model relates to injection mold technical field, concretely relates to a sliding block locking mechanism of injection mold, including the row position base block and sliding block, the top of row position base block is fixed with the side piece equally at both ends and installs, the row position block is slidably sleeved between row position base block and side piece, through the auxiliary locking assembly, when the inclined guide pillar cooperates with the inclined guide groove and makes the sliding block reach the position and preliminarily lock, micro motor drives rotating shaft and gear rotation, gear is engaged with the straight toothed bar, and the straight toothed bar pushes forward extruding block, makes extruding block embed extruding hole in the end of row position block, and extruding auxiliary locking is carried out to sliding block, prevent the lateral pressure produced by molten plastic from acting on the sliding block, thereby avoiding the existence of the cooperation gap between the outer surface of the inclined guide pillar and the inner wall of the inclined guide groove to cause the sliding block to shake, prevent the locking failure of sliding block, guarantee the plastic part forming quality, reduce the plastic part defects caused by the movement of sliding block, such as size deviation, surface flaw etc.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, and specifically to a slider locking mechanism for injection molds. Background Technology

[0002] With the expansion of plastic parts application scenarios, many plastic parts have complex structures such as side holes, snaps, and grooves on their side walls. These structures cannot be demolded by directly opening and closing the moving mold and the fixed mold. They must be formed by side core-pulling sliders. They are often used to form complex plastic parts such as bumper snaps and plastic parts around the engine. These plastic parts often have multiple side holes or irregular side protrusions. The automotive, electronics, and home appliance industries are the main application areas for injection molded plastic parts.

[0003] In existing applications, during the mold closing stage, the inclined guide pillar on the fixed mold side gradually inserts into the inclined guide groove of the slide block as the mold closing action occurs. The inclination angle of the inclined guide pillar matches the inclined guide groove, and the lateral force generated by the inclined surface contact drives the slide block to move along the guide groove towards the cavity until the slide block, slider, and cavity are precisely fitted. At the same time, after the mold is closed, the contact surface between the inclined guide pillar and the inclined guide groove forms a wedge structure, and the axial pressure of the inclined guide pillar is converted into a lateral locking force on the slide block. During the mold opening stage, the fixed mold drives the inclined guide pillar to move in the opposite direction, and the inclined guide pillar is gradually pulled out from the inclined guide groove. The reverse lateral force generated by its inclined structure drives the slide block to move along the guide groove away from the cavity, and drives the slider away from the cavity, completing the core pulling action.

[0004] However, some drawbacks exist: the locking of the slider in the mold cavity is achieved by the cooperation of the inclined guide post on the fixed mold side and the inclined guide groove of the slide block. However, during long-term use, the inclined guide post and the inclined guide groove need to repeatedly perform dynamic actions of fitting and guiding and separating and unlocking. Frequent relative movement can easily cause wear on the outer surface of the inclined guide post and the inner wall of the inclined guide groove. As the wear intensifies, a gap will gradually appear between the mating surfaces of the two. When the molten plastic is injected into the mold cavity and flows to the area where the slider is located during the injection molding process, the lateral pressure generated by the molten plastic will act on the slider. The existence of the gap between the outer surface of the inclined guide post and the inner wall of the inclined guide groove will cause the slider to wobble, eventually causing the slider to fail to lock and affecting the molding quality of the plastic part. Utility Model Content

[0005] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a slider locking mechanism for injection molds, which can effectively solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] This utility model provides a slider locking mechanism for an injection mold, including a slide base block and a slider. Side blocks are fixedly installed at both ends of the top of the slide base block. A slide block is slidably sleeved between the slide base block and the side blocks. A limit block is fixedly installed at the upper end of the slide base block near the slide block. An inclined guide groove is formed through the center of the slide block. A slider is slidably sleeved inside the inclined guide groove. A slider is fixedly installed at one end of the slide block. An auxiliary locking component is provided at one end of the limit block. A buffer component is provided at the lower end of one end of the slide block.

[0008] The auxiliary locking assembly includes a housing, and a connecting plate is fixedly installed at one end of the housing.

[0009] Furthermore, a rectangular travel groove is formed through the interior of the connecting plate, a micro motor is fixedly installed on one side of the outer shell, a rotating shaft is fixedly installed at one end of the micro motor, the rotating shaft rotates through the interior of the outer shell, a gear is fixedly sleeved on the outside of the rotating shaft, a spur gear is meshed with the outside of the gear, and a pressing block is fixedly installed at one end of the spur gear.

[0010] Furthermore, a sliding hole is provided through the interior of the limiting block, and a pressing block and a straight toothed rod are slidably fitted inside the sliding hole. A pressing hole is provided inside one end of the moving block, and the pressing hole is aligned with the sliding hole and the pressing block.

[0011] Furthermore, the buffer assembly includes fixing holes, each of which is located inside the lower part of one end of the sliding block. A fixing cylinder is fixedly sleeved inside the fixing hole, and a compression spring is fixedly installed inside the fixing cylinder at one end.

[0012] Furthermore, a sliding block is fixedly installed at one end of the compression spring, the sliding block is slidably sleeved inside the fixed cylinder, and a telescopic rod is fixedly connected to one end of the sliding block.

[0013] Furthermore, a sealing cover is fixedly installed at one end of the fixed cylinder, and the inside of the sealing cover is slidably sleeved on the outside of the telescopic rod, and a contact block is fixedly installed at one end of the telescopic rod.

[0014] The technical solution provided by this utility model has the following advantages compared with the known prior art:

[0015] 1. This utility model uses an auxiliary locking component. When the inclined guide post and the inclined guide groove cooperate to make the slider reach the position and be initially locked, the micro motor drives the rotating shaft and gear to rotate. The gear meshes with the spur gear, and the spur gear pushes the extrusion block forward, so that the extrusion block is embedded in the extrusion hole at the end of the sliding block, and extrudes and locks the slider. This prevents the lateral pressure generated by the molten plastic from acting on the slider, thereby avoiding the existence of a gap between the outer surface of the inclined guide post and the inner wall of the inclined guide groove, which would cause the slider to shake. This prevents the slider from failing to lock, ensures the molding quality of the plastic part, and reduces defects in the plastic part caused by slider movement, such as dimensional deviations and surface defects.

[0016] 2. At the same time, during the movement of the slide block, the collision with the outer wall of the mold cavity will generate a large impact force. Through the elastic deformation of the compression spring of the buffer assembly and the contact block, this impact force is effectively absorbed, avoiding the impact force from acting directly on the surface of the slide block, reducing the risk of wear and damage to the slide block due to impact, and effectively avoiding the occurrence of hard impact. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the limiting block, the moving block, and the slider structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the auxiliary locking component and the extrusion hole structure of this utility model;

[0021] Figure 4 This is a schematic diagram showing the disassembled structure of the auxiliary locking component and the buffer component of this utility model.

[0022] The labels in the diagram represent: 1. Sliding base block; 2. Side block; 3. Limiting block; 31. Sliding hole; 4. Sliding block; 41. Inclined guide groove; 42. Extrusion hole; 5. Sliding block; 6. Auxiliary locking assembly; 61. Housing; 62. Connecting plate; 63. Rectangular stroke groove; 64. Micro motor; 65. Rotating shaft; 66. Gear; 67. Straight gear; 68. Extrusion block; 8. Buffer assembly; 81. Contact block; 82. Telescopic rod; 83. Fixing hole; 84. Compression spring; 85. Fixing cylinder; 86. Sliding block. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0024] The present invention will be further described below with reference to the embodiments.

[0025] Example 1:

[0026] Reference Figures 1 to 4 This first embodiment of the present invention discloses a slider locking mechanism for an injection mold, including a slide base block 1 and a slider 5. Side blocks 2 are fixedly installed at both ends of the top of the slide base block 1. A slide block 4 is slidably fitted between the slide base block 1 and the side blocks 2. A limiting block 3 is fixedly installed at the upper end of the slide base block 1 near the slide block 4. An inclined guide groove 41 is formed through the center of the slide block 4. A slider 5 is slidably fitted inside the inclined guide groove 41. An auxiliary locking component 6 is provided at one end of the slide block 4. A buffer component 8 is provided at the lower end of the slide block 4. When the injection mold starts to close, the inclined guide post will gradually slide into the inclined guide groove 41 in the center of the slide block 4. As the mold closing action progresses, the inclined guide post generates a lateral thrust through the inclined surface of the inclined guide groove 41, pushing the slide block 4 to slide in the guide space formed by the slide base block 1 and the two side blocks 2. The slide block 4 synchronously drives the slider 5 fixed thereto to move until the slider 5 accurately reaches the preset molding cavity position, and together with other cavity components of the mold, forms a complete injection cavity, thereby locking the slider 5 in the cavity.

[0027] The auxiliary locking assembly 6 includes a housing 61. A connecting plate 62 is fixedly installed at one end of the housing 61. A rectangular travel groove 63 is formed through the interior of the connecting plate 62. A micro motor 64 is fixedly installed on one side of the housing 61. A rotating shaft 65 is fixedly installed at one end of the micro motor 64. The rotating shaft 65 rotates through the interior of the housing 61 and rotates within both sides of the housing 61. Bearings are fitted inside both sides of the housing 61 to facilitate the rotation of the rotating shaft 65. A gear 66 is fixedly fitted on the outer side of the rotating shaft 65. The micro motor 64 drives the rotating shaft 65 and the gear 66 to rotate. A spur gear 67 is meshed on the outer side of the gear 66. The rotational motion of the gear 66 is converted into linear motion of the spur gear 67 along its axis. A pressing block 68 is fixedly installed at one end of the spur gear 67. The extrusion block 68 is pushed forward. The interior of the limiting block 3 has a through-hole 31. The extrusion block 68 first passes through the through-hole 31 on the limiting block 3. The extrusion block 68 and the straight tooth rod 67 are slidably sleeved inside the through-hole 31. One end of the sliding block 4 has an extrusion hole 42. Finally, the front end of the extrusion block 68 is partially or completely embedded in the pre-set extrusion hole 42 at the end of the sliding block 4, further extruding and locking the slider 5 in the mold cavity. When the molten plastic is injected into the mold cavity and flows to the area where the slider 5 is located during the injection molding process, the lateral pressure generated by the molten plastic will act on the slider 5. However, during long-term use, the existence of the gap between the outer surface of the inclined guide post and the inner wall of the inclined guide groove 41 prevents the slider 5 from shaking, which will eventually cause the slider 5 to fail to lock, affecting the molding quality of the plastic part. The extrusion hole 42 is aligned with the through-hole 31 and the extrusion block 68.

[0028] In use, when the mold begins to close, the inclined guide pillar gradually slides into the inclined guide groove 41 in the center of the slide block 4. The inclined guide pillar generates lateral thrust through the inclined surface of the inclined guide groove 41, pushing the slide block 4 to slide within the guide space formed by the slide base block 1 and the two side blocks 2. The slide block 4 synchronously drives the slider 5 fixed to it to move until the slider 5 accurately reaches the preset molding cavity position, thereby locking the slider 5 in the cavity. The micro motor 64 drives the rotating shaft 65 and the gear 66 to rotate. The gear 66 meshes with the spur gear 67, and the rotational motion of the gear 66 is converted into the forward linear motion of the spur gear 67 along its axis. Rod 67 pushes the extrusion block 68 forward. The extrusion block 68 first passes through the sliding hole 31 on the limiting block 3. Finally, the front end of the extrusion block 68 is partially or completely embedded in the pre-set extrusion hole 42 at the end of the sliding block 4, further extruding and locking the slider 5 in the mold cavity. When the molten plastic is injected into the mold cavity and flows to the area where the slider 5 is located during the injection molding process, the lateral pressure generated by the molten plastic will act on the slider 5. However, during long-term use, the existence of the gap between the outer surface of the inclined guide post and the inner wall of the inclined guide groove 41 prevents the slider 5 from shaking, which eventually causes the slider 5 to fail to lock, affecting the molding quality of the plastic part.

[0029] Example 2:

[0030] Reference Figure 2 , Figure 4 This is the second embodiment of the present invention. This embodiment differs from the first embodiment in that: the buffer assembly 8 includes fixing holes 83, each of which is located inside the lower part of one end of the sliding block 4. A fixing cylinder 85 is fixedly sleeved inside the fixing hole 83. A compression spring 84 is fixedly installed inside the fixing cylinder 85 near one end. A sliding block 86 is fixedly installed at one end of the compression spring 84, and the sliding block 86 is slidably sleeved inside the fixing cylinder 85. A telescopic rod 82 is fixedly connected to one end of the sliding block 86. A sealing cover is fixedly installed at one end of the fixing cylinder 85, and the inside of the sealing cover is slidably sleeved outside the telescopic rod 82. A contact block 81 is fixedly installed at one end of the telescopic rod 82. When the sliding block 4 moves to its limit position, the contact block 81 installed at its end will first contact the outer wall of the mold cavity. The movement of the contact block 81 drives the connected... The telescopic rod 82 passes through the closed cover of the fixed cylinder 85, and its other end is connected to the sliding block 86. Since the sliding block 86 is restricted to sliding within the fixed cylinder 85 and there is a compression spring 84 behind it, the movement of the telescopic rod 82 will push the sliding block 86 to compress the compression spring 84. As the compression spring 84 is compressed, it will generate a gradually increasing elastic force opposite to the movement direction of the sliding block 4. This elastic force acts on the sliding block 86 and the telescopic rod 82, thus forming a reverse resistance to the movement of the sliding block 4. This resistance causes the movement speed of the sliding block 4 to gradually slow down until the elastic force of the spring and the inertial force of the sliding block 4 reach equilibrium, and the sliding block 4 stops smoothly. The speed of the sliding block 4 driving the slider 5 gradually decreases, effectively absorbing the impact force of the collision with the outer wall of the mold cavity during the movement of the sliding block 4, and avoiding hard impact.

[0031] In use, the contact block 81 at the end of the sliding block 4 first contacts a fixed surface of the mold (such as the outer wall of the mold cavity or a positioning block), forcing the contact block 81 to begin moving inward into the sliding block 4. The movement of the contact block 81 will drive the telescopic rod 82 to move together. Since the other end of the telescopic rod 82 is connected to a sliding block 86, and this sliding block 86 is restricted to slide axially within a fixed cylinder 85 fixed inside the sliding block 4, and a compression spring 84 is also provided behind the sliding block 86, the movement of the telescopic rod 82 will directly push the sliding block 86 to... When the compression spring 84 is compressed, it generates an elastic force opposite to the direction of movement of the slide block 4. This opposing elastic force is transmitted back to the slide block 4 through the sliding block 86 and the telescopic rod 82, thus creating a reverse resistance to the movement of the slide block 4. This resistance causes the movement speed of the slide block 4 to gradually decrease until the elastic force of the spring and the inertial force of the slide block 4 reach equilibrium, at which point the slide block 4 comes to a smooth stop. The speed of the sliding block 5 driven by the slide block 4 gradually decreases, effectively absorbing the impact force of the collision with the outer wall of the mold cavity during the movement of the slide block 4, thus avoiding hard impact.

[0032] The remaining structure is the same as that in Example 1.

[0033] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.

Claims

1. A slider locking mechanism for an injection mold, characterized in that: The system includes a base block (1) and a slider (5). Side blocks (2) are fixedly installed at both ends of the top of the base block (1). A sliding block (4) is slidably fitted between the base block (1) and the side blocks (2). A limiting block (3) is fixedly installed at the upper end of the base block (1) near the sliding block (4). An inclined guide groove (41) is opened through the center of the sliding block (4). A sliding (7) is slidably fitted inside the inclined guide groove (41). A slider (5) is fixedly installed at one end of the sliding block (4). An auxiliary locking component (6) is provided at one end of the limiting block (3). A buffer component (8) is provided at the lower end of one end of the sliding block (4). The auxiliary locking assembly (6) includes a housing (61), and a connecting plate (62) is fixedly installed at one end of the housing (61).

2. The slider locking mechanism for an injection mold according to claim 1, characterized in that, A rectangular travel groove (63) is provided through the interior of the connecting plate (62). A micro motor (64) is fixedly installed on one side of the outer shell (61). A rotating shaft (65) is fixedly installed at one end of the micro motor (64). The rotating shaft (65) rotates through the interior of the outer shell (61). A gear (66) is fixedly sleeved on the outside of the rotating shaft (65). A spur gear (67) is meshed on the outside of the gear (66). A pressing block (68) is fixedly installed at one end of the spur gear (67).

3. The slider locking mechanism for an injection mold according to claim 1, characterized in that, The limiting block (3) has a through hole (31) inside, and a pressing block (68) and a straight toothed rod (67) are slidably sleeved inside the sliding hole (31). One end of the moving block (4) has a pressing hole (42) inside, and the pressing hole (42) is aligned with the sliding hole (31) and the pressing block (68).

4. The slider locking mechanism for an injection mold according to claim 1, characterized in that, The buffer assembly (8) includes a fixing hole (83), which is located at the lower end of one end of the row block (4). A fixing cylinder (85) is fixedly sleeved inside the fixing hole (83), and a compression spring (84) is fixedly installed at one end inside the fixing cylinder (85).

5. The slider locking mechanism for an injection mold according to claim 4, characterized in that, A sliding block (86) is fixedly installed at one end of the compression spring (84). The sliding block (86) is slidably sleeved inside the fixed cylinder (85). A telescopic rod (82) is fixedly connected to one end of the sliding block (86).

6. The slider locking mechanism for an injection mold according to claim 5, characterized in that, One end of the fixed cylinder (85) is fixedly fitted with a closed cover, and the inside of the closed cover is slidably sleeved on the outside of the telescopic rod (82). One end of the telescopic rod (82) is fixedly fitted with a contact block (81).

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