Injection mold with sliding block arc

Abstract

The application relates to the technical field of injection molds, and particularly discloses a slider arc drawing type injection mold, which comprises a fixed mold and a movable mold, a mold core is arranged between the fixed mold and the movable mold, a slider is slidably connected to the side wall of the mold core, a core for forming a workpiece is arranged on the slider, transmission members for driving the slider to slide are arranged between the movable mold and the fixed mold, an arc-shaped insert is arranged in the mold core, and the slider and the arc-shaped insert are transmissionally connected through linkage members. The linear motion of the slider is converted into the rotary motion of the arc-shaped insert through the linkage members, the arc-shaped insert can be drawn out of the mold core along a preset track, the problem that an arc-shaped workpiece is difficult to demold is effectively solved, and the production efficiency is improved; the slider is driven through the cooperation of an inclined guide column and a wedge-shaped groove, and the linkage design of the gear and the rack is combined, so that the mold structure is simplified, and the manufacturing and maintenance costs are reduced.

Description

Technical Field

[0001] This invention relates to the field of injection mold technology, specifically to a slider arc-type injection mold. Background Technology

[0002] Injection molding, also known as injection molding, is a molding method that combines injection and molding. The advantages of injection molding include high production speed and efficiency, automated operation, a wide variety of designs and shapes (from simple to complex), and sizes ranging from large to small. It also produces dimensionally accurate products, facilitates product updates and replacements, and can create complex shapes. Injection molding is suitable for mass production and molding processes involving complex shapes.

[0003] Injection molds are tools used to produce plastic products; they also give plastic products their complete structure and precise dimensions. Injection molding is a processing method used for the mass production of certain complex-shaped parts. Specifically, it refers to injecting molten plastic into a mold cavity under high pressure using an injection molding machine, and after cooling and solidification, obtaining the molded product. The mold base is an inseparable part of the mold. The mold base is a semi-finished product of the mold, composed of various steel plates and fitting parts; it can be considered the skeleton of the entire mold. During mold processing, the mold base is used to fix the mold and meet the needs of mold processing.

[0004] In the prior art, there is a Chinese patent with authorization announcement number CN218053787U entitled "A One-Way Sliding Sliding Pin Core Pulling Mechanism for Injection Molds". The patent discloses a one-way sliding sliding pin core pulling mechanism for injection molds, which includes an upper mold plate, a lower mold plate, an upper mold core, and a lower mold core. The upper mold core is provided with a vertical limiting seat. A side insert and a lower insert are provided between the upper mold core and the lower mold core. A core pulling assembly is provided on the side of the side insert away from the upper mold core. The core pulling assembly includes a sliding seat. A wedge block is provided on one side of the sliding seat. Side positioning blocks are provided on both sides of the wedge block. A guide pin is provided at the upper end of the wedge block and is fixedly connected to the upper mold plate. A guide block is provided inside the sliding seat. A slider is provided on the side of the guide block near the wedge block. A product is placed on the lower insert.

[0005] In the aforementioned patent, by employing a structure that allows for movement and clearance between the slider and the wedge block, the first and second inclined pins can both form the product's undercut and exit the product during mold opening, thus simplifying the mold structure. In existing injection molds, molten plastic is filled into the moving and fixed molds, and then the workpiece is removed after cooling and solidification. The workpiece is typically connected to external workpieces or equipment via connectors. It is known that during injection molding, connectors are usually pipes or similar external connections, especially curved pipes. Therefore, there is a problem where the molded workpiece is difficult to demold, presenting certain shortcomings. Summary of the Invention

[0006] The purpose of this invention is to provide a slider arc-type injection mold to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a slider-type injection mold, comprising a fixed mold and a moving mold, wherein a mold core is disposed between the fixed mold and the moving mold, a slider is slidably connected to the side wall of the mold core, a core for forming a workpiece is disposed on the slider, and a transmission component for driving the slider to slide is disposed between the moving mold and the fixed mold; an arc-shaped insert is installed inside the mold core, and the slider and the arc-shaped insert are connected by a linkage component; during the opening stroke of the fixed mold and the moving mold, the slider is driven by the transmission component to move the core away from the workpiece, and the arc-shaped insert is driven by the linkage component to be extracted from the mold core.

[0008] Furthermore, the transmission component includes an inclined guide post mounted on the fixed mold, and the slider has a wedge-shaped groove adapted to the inclined guide post, and the inclined guide post and the wedge-shaped groove are slidably connected.

[0009] Furthermore, the linkage includes a linkage rod rotatably connected to the moving mold, a gear being provided on the linkage rod, a spur rack being fixedly connected to the slider, and the spur rack meshing with the gear; an arc-shaped rack is installed on the arc-shaped insert, and the arc-shaped rack meshing with the gear.

[0010] Furthermore, multiple sets of reset buffers are provided between the slider and the moving mold.

[0011] Furthermore, the reset buffer includes a mounting plate disposed on the moving mold, and a sliding rod is fixedly connected to the slider, and the sliding rod is slidably connected to the mounting plate; an elastic element is disposed between the sliding rod and the mounting plate.

[0012] Furthermore, the elastic element includes a reset buffer spring, a mounting cap is fixedly connected to the slide rod, and a reset buffer spring is provided between the mounting cap and the mounting plate.

[0013] Furthermore, a limiting component is provided between the moving mold and the fixed mold; the limiting component includes a limiting cylinder fixedly connected to the moving mold, and a limiting post slidably connected to the limiting cylinder is provided on the fixed mold.

[0014] Furthermore, an ejector is provided on the top of the moving mold to eject the injection-molded workpiece.

[0015] Furthermore, the ejector includes an ejector plate, on which multiple sets of ejector rods are mounted, and the ejector rods are slidably connected to the mold core.

[0016] Furthermore, multiple sets of hooks are provided between the moving mold and the fixed mold.

[0017] Compared with the prior art, the beneficial effects of this invention are as follows: This slider-arc extraction injection mold converts the linear motion of the slider into the rotational motion of the arc-shaped insert through a linkage component, enabling the arc-shaped insert to be extracted from the mold core along a preset trajectory, effectively solving the problem of difficult demolding of arc-shaped workpieces and improving production efficiency; the slider is driven by the cooperation of inclined guide pillars and wedge grooves, combined with the linkage design of gears and racks, simplifying the mold structure and reducing manufacturing and maintenance costs; it is suitable for injection molding of workpieces with complex shapes, especially those with arc features, expanding the application scenarios of the mold; therefore, this invention significantly improves the demolding efficiency, accuracy, and reliability of the mold through innovative linkage and transmission design, and has high practicality and economic value. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0019] Figure 1 This is a schematic diagram of the overall structure provided for an embodiment of the present invention; Figure 2 This is a schematic diagram of the fixed-mold hidden state structure provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the mold core installation position structure provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the hidden state of the moving model provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the installation method of the reset buffer provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the linkage installation method provided in an embodiment of the present invention; Figure 7 This is a schematic diagram of the installation method of the slider and linkage provided in an embodiment of the present invention; Figure 8 This is a schematic diagram of the exploded state structure of the inclined guide post and slider provided in an embodiment of the present invention.

[0020] Explanation of reference numerals in the attached drawings: 1. Fixed mold; 2. Moving mold; 3. Ejector; 4. Mold core; 5. Slider; 6. Angled guide post; 7. Wedge groove; 8. Core; 9. Reset buffer; 91. Mounting plate; 92. Slide rod; 93. Mounting cap; 94. Reset buffer spring; 10. Arc rack; 11. Gear; 12. Linkage rod; 13. Straight rack. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Please see Figures 1-8 The present invention provides a technical solution comprising a fixed mold 1 and a moving mold 2, wherein a mold core 4 is disposed between the fixed mold 1 and the moving mold 2, and a slider 5 is slidably connected to the side wall of the mold core 4, wherein a core 8 for forming a workpiece is disposed on the slider 5, and a transmission component for driving the slider 5 to slide is disposed between the moving mold 2 and the fixed mold 1; an arc-shaped insert is installed inside the mold core 4, and the slider 5 and the arc-shaped insert are connected by a linkage component; during the opening stroke of the fixed mold 1 and the moving mold 2, the slider 5 is driven by the transmission component to move the core 8 away from the workpiece, and the arc-shaped insert is driven by the linkage component to be pulled out from the mold core 4.

[0023] Specifically, in this slider-type injection mold, a transmission component is provided between the moving mold 2 and the fixed mold 1 to drive the slider 5 to slide. An arc-shaped insert is installed inside the mold core 4, and the slider 5 is connected to the arc-shaped insert via a linkage. The fixed mold 1 and the moving mold 2 are precisely aligned via guide pillars and guide sleeves. The mold core 4 is fixed between the fixed mold 1 and the moving mold 2, and its cavity is used to form the workpiece. The slider 5 is slidably connected to the side wall of the mold core 4 via a linear guide rail or T-slot to ensure smooth sliding. A core 8 is installed on the slider 5 to form the internal structure of the workpiece. The arc-shaped insert is embedded inside the mold core 4, its shape matching the arc-shaped features of the workpiece, and is connected to the slider 5 via a linkage. Specifically, during mold opening, the moving mold 2 separates from the fixed mold 1, the transmission component pushes the slider 5 to slide outward along the side wall of the mold core 4, and the core 8 is extracted from the workpiece. At the same time, the linkage converts the linear motion of the slider 5 into the rotational motion of the arc-shaped insert, causing it to be pulled out of the mold core 4 along a preset arc trajectory, thus avoiding damage to the workpiece.

[0024] This slider-type injection mold converts the linear motion of the slider into the rotational motion of the arc-shaped insert through a linkage mechanism, allowing the arc-shaped insert to be extracted from the mold core along a preset trajectory. This effectively solves the problem of difficult demolding of arc-shaped workpieces and improves production efficiency. The slider is driven by the cooperation of inclined guide pillars and wedge grooves, combined with the linkage design of gears and racks, simplifying the mold structure and reducing manufacturing and maintenance costs. It is suitable for injection molding of complex shapes, especially workpieces with arc features, expanding the application scenarios of the mold. Therefore, this invention, through innovative linkage and transmission design, significantly improves the demolding efficiency, accuracy, and reliability of the mold, possessing high practicality and economic value.

[0025] In the embodiments provided by this invention, the transmission component includes an inclined guide post 6 mounted on a fixed mold 1, and a wedge-shaped groove 7 adapted to the inclined guide post 6 on the slider 5. The inclined guide post 6 and the wedge-shaped groove 7 are slidably connected. The inclined guide post 6 is fixed on the fixed mold 1, and the inclination angle is set according to the working requirements to ensure efficient power transmission during mold opening. The inclined surface of the wedge-shaped groove 7 is perfectly matched with the inclined guide post 6, and the surface is polished to reduce friction. The inclined guide post 6 is made of high-strength alloy steel, and the surface is chrome-plated to enhance wear resistance. A lubrication groove or graphite bushing can be added inside the wedge-shaped groove 7 to extend its service life.

[0026] In the embodiments provided by this invention, the linkage includes a linkage rod 12 rotatably connected to the moving mold 2, a gear 11 mounted on the linkage rod 12, and a rack 13 fixedly connected to the slider 5, the rack 13 meshing with the gear 11; an arc-shaped insert is mounted with an arc-shaped rack 10, the arc-shaped rack 10 meshing with the gear 11. Specifically, the gear 11 is mounted on the moving mold 2 via bearings, meshing with the rack 13 and the arc-shaped rack 10 on both sides respectively. When the slider 5 moves, the rack 13 drives the gear 11 to rotate clockwise, and the gear 11 drives the arc-shaped rack 10 to move along an arc, thereby pulling the arc-shaped insert to rotate and be pulled out. When the mold closes, the reverse action resets the arc-shaped insert.

[0027] In the embodiments provided by the present invention, multiple sets of reset buffer members 9 are further provided between the slider 5 and the moving mold 2. In the embodiments provided by the present invention, the reset buffer member 9 includes a mounting plate 91 disposed on the moving mold 2, and a slide rod 92 is fixedly connected to the slider 5, and the slide rod 92 is slidably connected to the mounting plate 91; an elastic member is provided between the slide rod 92 and the mounting plate 91. The elastic member includes a reset buffer spring 94, and a mounting cap 93 is fixedly connected to the slide rod 92, with the reset buffer spring 94 disposed between the mounting cap 93 and the mounting plate 91.

[0028] In the embodiments provided by the present invention, a limiting component is further provided between the moving mold 2 and the fixed mold 1; the limiting component includes a limiting cylinder fixedly connected to the moving mold 2, and a limiting post slidably connected to the limiting cylinder on the fixed mold 1. The limiting cylinder is inlaid with a bronze bushing, and the surface of the limiting post is plated with hard chrome. The insertion depth is 30-50mm when the mold is closed to ensure the mold alignment accuracy. A buffer pad is provided at the end of the limiting post to reduce impact noise.

[0029] In the embodiments provided by this invention, an ejector 3 is further provided on the top of the moving mold 2 for ejecting the injection-molded workpiece. The ejector plate is driven by a hydraulic cylinder of the injection molding machine and has a return spring at its end. In the embodiments provided by the present invention, the ejector 3 includes an ejector plate, on which multiple sets of ejector rods are mounted. The ejector rods are slidably connected to the mold core 4 to facilitate ejecting the workpiece.

[0030] In the embodiments provided by the present invention, multiple sets of hooks are provided between the moving mold 2 and the fixed mold 1, and four sets of hooks are provided between the moving mold 2 and the fixed mold 1, with a rated load of 2 tons, and the installation positions are equidistant from the center of gravity of the mold.

[0031] It should be noted that all electrical equipment involved in this application can be powered by batteries or external power sources, and this application is equipped with a control system for controlling the operation of the entire equipment.

[0032] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0033] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sliding block arc-type injection mold, comprising a fixed mold (1) and a moving mold (2), characterized in that: A mold core (4) is provided between the fixed mold (1) and the moving mold (2). A slider (5) is slidably connected to the side wall of the mold core (4). A core (8) for forming the workpiece is provided on the slider (5). A transmission component for driving the slider (5) to slide is provided between the moving mold (2) and the fixed mold (1). The mold core (4) is equipped with an arc-shaped insert, and the slider (5) is connected to the arc-shaped insert through a linkage mechanism. During the opening stroke of the fixed mold (1) and the moving mold (2), the sliding block (5) is driven by the transmission component to move the core (8) away from the workpiece, and the arc-shaped insert is pulled out from the mold core (4) by the linkage component. The transmission component includes an inclined guide post (6) mounted on a fixed mold (1), and a wedge-shaped groove (7) adapted to the inclined guide post (6) is provided on the slider (5). The inclined guide post (6) and the wedge-shaped groove (7) are slidably connected. The linkage component includes a linkage rod (12) rotatably connected to the moving mold (2), a gear (11) is provided on the linkage rod (12), and a rack (13) is fixedly connected to the slider (5), the rack (13) meshing with the gear (11); An arc-shaped rack (10) is mounted on the arc-shaped insert, and the arc-shaped rack (10) meshes with the gear (11); Multiple sets of reset buffers (9) are also provided between the slider (5) and the moving mold (2); The reset buffer (9) includes a mounting plate (91) disposed on the moving mold (2), and a sliding rod (92) is fixedly connected to the slider (5), and the sliding rod (92) is slidably connected to the mounting plate (91); an elastic element is disposed between the sliding rod (92) and the mounting plate (91); The elastic element includes a reset buffer spring (94), and a mounting cap (93) is fixedly connected to the slide rod (92). A reset buffer spring (94) is provided between the mounting cap (93) and the mounting plate (91). A limiting component is also provided between the moving mold (2) and the fixed mold (1); The limiting component includes a limiting cylinder fixedly connected to the moving mold (2), and a limiting post slidably connected to the limiting cylinder is provided on the fixed mold (1); The moving mold (2) is also provided with an ejector (3) on its top, which is used to eject the injection-molded workpiece.

2. The slider arc-type injection mold according to claim 1, characterized in that: The ejector (3) includes an ejector plate, on which multiple sets of ejector rods are mounted, and the ejector rods are slidably connected to the mold core (4).

3. The slider arc-type injection mold according to claim 1, characterized in that: Multiple sets of hooks are provided between the moving mold (2) and the fixed mold (1).

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