Graded ejection mechanism for injection mold

Abstract

The grading ejection mechanism comprises a fixed mold, a movable mold and a bottom box, a cavity is formed in the upper portion of the fixed mold, the movable mold is installed on the top of the fixed mold, the bottom box is fixed to the bottom of the fixed mold, a partition plate is fixed to the middle of the inner side of the bottom box, first ejection mechanisms are installed at the two ends of the interior of the bottom box, and second ejection mechanisms are installed at the two ends of the interior of the bottom box. And a second ejection mechanism is arranged in the bottom box and located between the two first ejection mechanisms, an adjusting transmission mechanism is installed at the bottom of the fixed mold and comprises a driving motor, and the driving motor is arranged on the right side of the bottom box. According to the graded ejection mechanism for the injection mold, a first ejection column on the first ejection mechanism can be used in cooperation with a movable ejection rod, a product in the mold can be evenly and preliminarily ejected out, the material ejection uniformity of the device is improved, graded ejection of the product can be facilitated in cooperation with a second ejection mechanism, and the product quality is improved. And the ejection effect of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field related to injection molds, in particular to a graded ejection mechanism for injection molds. Background Art

[0002] The product is usually removed from the injection mold in one go through the mold ejection system. However, the following situations often occur when encountering products with special shapes: after one ejection action is completed, the product is difficult to completely demold or cannot fall freely, so a second ejection is required to completely eject the product;

[0003] The existing publication number CN215095237U discloses a graded ejection mechanism for an injection mold, comprising a gear, a toothed plate and a crank slider structure, wherein the toothed plate is connected to the lower ejector plate by threads, the gear bracket is connected to the support plate by threads, the gear is rotatably connected to the gear bracket and meshes with the toothed plate, the lower end of the crank in the crank slider structure is rotatably connected to the gear, and the slider is located in a slide groove that passes through the middle of the support plate;

[0004] In the above document, the slider in the crank slider structure is given an upward action to complete one ejection through the meshing transmission of the tooth plate and the gear. The structure is simple, the installation is easy, and it is easy to change the ejection stroke once, which can adapt to various manufacturing requirements; but the above ejection structure is relatively simple, which can easily cause uneven force on the product of the mold during ejection, affecting the quality of the product. At the same time, the adjustment of the graded ejection structure is not convenient enough. Therefore, we propose a graded ejection mechanism for injection molds to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a graded ejection mechanism for an injection mold to solve the problems raised by the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a graded ejection mechanism for an injection mold, comprising a fixed mold, a movable mold and a bottom box, a cavity is arranged above the fixed mold, and a movable mold is installed on the top of the fixed mold, a bottom box is fixed to the bottom of the fixed mold, and a partition is fixed to the inner middle of the bottom box, first ejection mechanisms are installed at both ends of the interior of the bottom box, a second ejection mechanism is arranged between two groups of the first ejection mechanisms in the interior of the bottom box, an adjusting transmission mechanism is installed at the bottom of the fixed mold, the adjusting transmission mechanism comprises a driving motor, and the driving motor is arranged on the right side of the bottom box, and a connecting shaft is fixed to the output end of the driving motor, a fixed frame is arranged on the surface of the driving motor, an electric push rod is fixed to the surface of the bottom box, and the output end of the electric push rod is fixed to the surface of the fixed frame, third bevel gears are fixed to the left and right ends of the surface of the connecting shaft, a fourth bevel gear is fixed to the surface of the connecting shaft between the two groups of the third bevel gears, and a supporting sleeve fixed to the bottom of the bottom box is slidably arranged on the surface of the connecting shaft.

[0007] Preferably, the first ejection mechanism includes a first rotating screw, which is rotatably connected to both ends of the partition, and a first bevel gear is fixed to the bottom of the first rotating screw. A first ejection column sliding on the upper surface of the fixed mold is arranged above the first rotating screw, and the first ejection column is arranged in a square shape.

[0008] The adoption of the above technical solution can facilitate the first ejector column to slide on the fixed mold.

[0009] Preferably, the first top column and the first rotating screw are connected by threaded connection, and support plates are fixed at both ends of the first top column, and the support plates are arranged in a "T" shape.

[0010] The above technical solution is adopted to facilitate the threaded movement of the first rotating screw and the first push column, so that the first push column can perform preliminary pushing of the material, and the first push column can also drive the support plate to move synchronously.

[0011] Preferably, a plug rod is evenly fixed on the upper surface of the support plate, and a piston head is fixed above the plug rod, a fixed cylinder corresponding to the plug rod is fixed on the surface of the fixed mold, a movable ejector rod is slidably arranged inside the fixed cylinder, and the upper end surface of the movable ejector rod is flush with the upper surface of the inner part of the fixed mold.

[0012] By adopting the above technical solution, when the support plate moves, the plug rod above the support plate can drive the piston head to move upward inside the fixed cylinder, so as to drive the piston head to synchronously eject the movable ejector rod inside the fixed cylinder upward under the action of air pressure, so as to improve the ejection effect of the core.

[0013] Preferably, the second ejection mechanism includes a second rotating screw, which is rotatably connected to the middle part of the partition, a second bevel gear is fixed to the bottom of the second rotating screw, a second ejector column is connected above the second rotating screw, and a ejector plate is fixed to the upper surface of the second ejector column, and the upper surface of the ejector plate is flush with the inner upper surface of the fixed mold.

[0014] By adopting the above technical solution, the core inside the mold can be ejected for a second time through the second ejection mechanism, thereby improving the ejection effect of the device.

[0015] Preferably, the second rotating screw is threadedly connected to the second ejector column, and the second ejector column is slidably connected to the fixed mold.

[0016] By adopting the above technical solution, the second rotating screw and the second top column can move in a threaded manner so that the second top column can drive the top plate to move upward.

[0017] Preferably, the connecting shaft is slidably connected to the side of the bottom box, the third bevel gear on the surface of the connecting shaft is meshingly connected to the first bevel gear, and the fourth bevel gear on the surface of the connecting shaft is meshingly connected to the second bevel gear.

[0018] By adopting the above technical solution, the third bevel gear on the surface of the connecting shaft can be meshed with the first bevel gear to facilitate the rotation of the first rotating screw rod. At the same time, in conjunction with the use of the electric push rod, the electric push rod can drive the connecting shaft to move, so that the third bevel gear on the surface of the connecting shaft is separated from the first bevel gear, and the fourth bevel gear on the surface of the connecting shaft is meshed with the second bevel gear, thereby driving the second rotating screw rod to rotate, so as to facilitate the graded rotation of the device.

[0019] Compared with the prior art, the utility model has the following beneficial effects: the graded ejection mechanism for injection molds,

[0020] (1) The first ejector column on the first ejection mechanism can be used in conjunction with the movable ejector rod to uniformly eject the product in the mold, thereby improving the uniformity of the ejection of the device. In addition, the second ejection mechanism can be used to facilitate the graded ejection of the product, thereby improving the ejection effect of the device.

[0021] (2) The electric push rod on the adjustment transmission mechanism can be used in conjunction with the third bevel gear and the fourth bevel gear on the connecting shaft to respectively engage and rotate the first bevel gear at the bottom of the first rotating screw and the second bevel gear at the bottom of the second rotating screw in a graded manner to facilitate graded adjustment of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the front view structure of the utility model;

[0023] Figure 2This is a schematic diagram of the front cross-sectional structure of the utility model;

[0024] Figure 3 It is a schematic diagram of the side sectional structure of the utility model;

[0025] Figure 4 It is a schematic diagram of the top view structure of the fixed mold of the utility model.

[0026] In the figure: 1, fixed mold; 2, cavity; 3, movable mold; 4, bottom box; 5, partition; 6, first ejector mechanism; 601, first rotating screw; 602, first bevel gear; 603, first ejector column; 604, support plate; 605, plug rod; 606, fixed cylinder; 607, piston head; 608, movable ejector; 7, second ejector mechanism; 701, second rotating screw; 702, second bevel gear; 703, second ejector column; 704, ejector plate; 8, adjusting transmission mechanism; 801, driving motor; 802, connecting shaft; 803, fixed frame; 804, electric push rod; 805, support sleeve; 806, third bevel gear; 807, fourth bevel gear. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] See also Figure 1-4The utility model provides a technical solution: a graded ejection mechanism for an injection mold, comprising a fixed mold 1, a movable mold 3 and a bottom box 4, a cavity 2 is arranged above the fixed mold 1, and the movable mold 3 is installed on the top of the fixed mold 1, a bottom box 4 is fixed to the bottom of the fixed mold 1, and a partition 5 is fixed to the inner middle part of the bottom box 4, and a first ejection mechanism 6 is installed at both ends of the bottom box 4, the first ejection mechanism 6 comprises a first rotating screw 601, the first rotating screw 601 is rotatably connected to both ends of the partition 5, and a first bevel gear 602 is fixed to the bottom of the first rotating screw 601, a first ejection column 603 sliding on the upper surface of the fixed mold 1 is arranged above the first rotating screw 601, the first ejection column 603 is arranged in a square shape, which can facilitate the first ejection column 603 to slide on the fixed mold 1, the first ejection column 603 is connected to the first rotating screw 601 by a threaded connection, and support plates 604 are fixed to both ends of the first ejection column 603, and The support plate 604 is arranged in a "T" shape, which is convenient for the first rotating screw rod 601 and the first ejector column 603 to threadedly move, so that the first ejector column 603 can perform preliminary ejection, and at the same time, the first ejector column 603 can also drive the support plate 604 to move synchronously. The upper surface of the support plate 604 is evenly fixed with a plug rod 605, and a piston head 607 is fixed above the plug rod 605. The surface of the fixed mold 1 is fixed with a fixed cylinder 606 arranged in a one-to-one correspondence with the plug rod 605. A movable ejector rod 608 is slidably arranged inside the fixed cylinder 606. The upper end surface of the movable ejector rod 608 is flush with the upper surface of the inner part of the fixed mold 1. When the support plate 604 moves, the plug rod 605 above the support plate 604 drives the piston head 607 to move upward inside the fixed cylinder 606, so as to drive the piston head 607 to synchronously eject the movable ejector rod 608 inside the fixed cylinder 606 upward under the action of air pressure, so as to improve the ejection effect of the core;

[0029] See also Figure 1-4 , a second ejection mechanism 7 is arranged between the two groups of first ejection mechanisms 6 inside the bottom box 4, and the second ejection mechanism 7 includes a second rotating screw 701, which is rotatably connected to the middle part of the partition 5, and a second bevel gear 702 is fixed to the bottom of the second rotating screw 701, and a second ejector column 703 is connected to the top of the second rotating screw 701, and a top plate 704 is fixed to the upper surface of the second ejector column 703, and the upper surface of the top plate 704 is flush with the upper surface of the fixed mold 1. The core inside the mold can be ejected for a second time through the second ejection mechanism 7, so as to improve the ejection effect of the device, and the second rotating screw 701 is threadedly connected to the second ejector column 703, and the second ejector column 703 is slidably connected to the fixed mold 1, and can be threadedly moved by the second rotating screw 701 and the second ejector column 703, so that the second ejector column 703 drives the ejector plate 704 to move upward;

[0030] See also Figure 1-4, an adjusting transmission mechanism 8 is installed at the bottom of the fixed mold 1, and the adjusting transmission mechanism 8 includes a driving motor 801, and the driving motor 801 is arranged on the right side of the bottom box 4, and a connecting shaft 802 is fixed to the output end of the driving motor 801, a fixing frame 803 is provided on the surface of the driving motor 801, an electric push rod 804 is fixed to the surface of the bottom box 4, and the output end of the electric push rod 804 is fixed to the surface of the fixing frame 803, and third bevel gears 806 are fixed to the left and right ends of the surface of the connecting shaft 802, and a fourth bevel gear 807 is fixed to the surface of the connecting shaft 802 between the two groups of third bevel gears 806, and a supporting sleeve 805 fixed to the bottom of the bottom box 4 is slidably provided on the surface of the connecting shaft 802, and the side of the connecting shaft 802 and the bottom box 4 is Sliding connection, the third bevel gear 806 on the surface of the connecting shaft 802 is meshed with the first bevel gear 602, and the fourth bevel gear 807 on the surface of the connecting shaft 802 is meshed with the second bevel gear 702. The third bevel gear 806 on the surface of the connecting shaft 802 can be meshed with the first bevel gear 602 to facilitate the rotation of the first rotating screw 601. At the same time, with the use of the electric push rod 804, the electric push rod 804 drives the connecting shaft 802 to move, so that the third bevel gear 806 on the surface of the connecting shaft 802 is separated from the first bevel gear 602, and the fourth bevel gear 807 on the surface of the connecting shaft 802 is meshed with the second bevel gear 702, which is convenient for driving the second rotating screw 701 to rotate, so as to facilitate the graded rotation of the device.

[0031] Working principle: First, when ejecting, the driving motor 801 on the regulating transmission mechanism 8 can be turned on first, so that the driving motor 801 drives the third bevel gear 806 to rotate through the connecting shaft 802, and then the third bevel gear 806 is meshed and rotated with the first bevel gear 602 on the first ejection mechanism 6. When the first bevel gear 602 rotates, it will drive the first rotating screw 601 and the first ejector column 603 to move in a threaded manner, so that the first ejector column 603 slides on the fixed mold 1, so as to facilitate the initial ejection of the first ejector column 603. When the first ejector column 603 moves upward in a threaded manner, the first ejector column 603 can move upward through the support plates 604 at both ends, so that the support plates 604 drive the piston head 607 above the plug rod 605 to move upward inside the fixed cylinder 606, so that the movable ejector rod 608 inside the fixed cylinder 606 is ejected upward under the action of air pressure. The fixed cylinder 606 is evenly distributed on both sides of the first ejector column 603, which can improve the uniformity of ejection of the device.

[0032] When the product in the mold is initially ejected, the electric push rod 804 is opened to drive the driving motor 801 inside the fixed frame 803 to move outward, so that the third bevel gear 806 on the surface of the connecting shaft 802 is separated from the first bevel gear 602 under the first rotating screw 601, and at the same time, the fourth bevel gear 807 on the surface of the connecting shaft 802 is combined with the second bevel gear 702 under the second rotating screw 701, so that the second rotating screw 701 drives the second ejector column 703 to move upward in thread, so that the second ejector column 703 drives the ejector plate 704 to move upward. The length of the second ejector column 703 is greater than that of the first ejector column 603. Therefore, the second ejector column 703 can eject the first ejector column 603 and then perform secondary ejection on the middle part of the product, thereby improving the ejection effect of the device. This is the use principle of the graded ejection mechanism for the injection mold.

[0033] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A graded ejection mechanism for an injection mold, comprising a fixed mold (1), a movable mold (3) and a bottom box (4), characterized in that: A cavity (2) is arranged above the fixed mold (1), and a movable mold (3) is installed on the top of the fixed mold (1); a bottom box (4) is fixed at the bottom of the fixed mold (1), and a partition (5) is fixed at the middle of the inner side of the bottom box (4); first ejection mechanisms (6) are installed at both ends of the interior of the bottom box (4); a second ejection mechanism (7) is arranged inside the bottom box (4) between two groups of the first ejection mechanisms (6); an adjustment transmission mechanism (8) is installed at the bottom of the fixed mold (1), and the adjustment transmission mechanism (8) comprises a drive motor (801), and the drive motor (801) is arranged on the right side of the bottom box (4), and the drive motor (801) is arranged on the right side of the bottom box (4). A connecting shaft (802) is fixed to the output end of the machine (801); a fixing frame (803) is provided on the surface of the driving motor (801); an electric push rod (804) is fixed to the surface of the bottom box (4); and the output end of the electric push rod (804) is fixed to the surface of the fixing frame (803); third bevel gears (806) are fixed to the left and right ends of the surface of the connecting shaft (802); a fourth bevel gear (807) is fixed to the surface of the connecting shaft (802) between two groups of the third bevel gears (806); and a supporting sleeve (805) fixed to the bottom of the bottom box (4) is slidably provided on the surface of the connecting shaft (802).

2. A graded ejection mechanism for an injection mold according to claim 1, characterized in that: The first ejection mechanism (6) comprises a first rotating screw rod (601), the first rotating screw rod (601) is rotatably connected to the two ends of the partition (5), and a first bevel gear (602) is fixed to the bottom of the first rotating screw rod (601), and a first ejection column (603) is arranged above the first rotating screw rod (601) and slides on the upper surface of the fixed mold (1), and the first ejection column (603) is arranged in a square shape.

3. A step-by-step ejection mechanism for an injection mold according to claim 2, characterized in that: The first top column (603) is connected to the first rotating screw rod (601) by threaded connection. Support plates (604) are fixed at both ends of the first top column (603), and the support plates (604) are arranged in a "T" shape.

4. A graded ejection mechanism for an injection mold according to claim 3, characterized in that: A plug rod (605) is evenly fixed on the upper surface of the support plate (604), and a piston head (607) is fixed above the plug rod (605). A fixed cylinder (606) corresponding to the plug rod (605) is fixed on the surface of the fixed mold (1). A movable ejector rod (608) is slidably arranged inside the fixed cylinder (606), and the upper end surface of the movable ejector rod (608) is flush with the upper surface of the inner part of the fixed mold (1).

5. The step-by-step ejection mechanism for an injection mold according to claim 1, characterized in that: The second ejection mechanism (7) comprises a second rotating screw (701), the second rotating screw (701) is rotatably connected to the middle part of the partition (5), a second bevel gear (702) is fixed to the bottom of the second rotating screw (701), a second ejector column (703) is connected above the second rotating screw (701), and an ejector plate (704) is fixed to the upper surface of the second ejector column (703), and the upper surface of the ejector plate (704) is flush with the inner upper surface of the fixed mold (1).

6. A graded ejection mechanism for an injection mold according to claim 5, characterized in that: The second rotating screw (701) is threadedly connected to the second top column (703), and the second top column (703) is slidably connected to the fixed mold (1).

7. A graded ejection mechanism for an injection mold according to claim 1, characterized in that: The connecting shaft (802) is slidably connected to the side of the bottom box (4); the third bevel gear (806) on the surface of the connecting shaft (802) is meshingly connected to the first bevel gear (602); and the fourth bevel gear (807) on the surface of the connecting shaft (802) is meshingly connected to the second bevel gear (702).

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