Injection mold convenient for ejection and mold opening

Abstract

The utility model discloses an injection mold convenient for ejection and mold opening, which comprises two racks, and an operation table is fixedly arranged at the upper ends of the racks; the fixed mold is arranged in the middle of the upper end of the operation table, eight ejection holes are formed in the lower end of the interior of the fixed mold, electric push rods are arranged in the ejection holes, and four fixed mold grooves are formed in the upper end of the interior of the fixed mold; the mounting grooves are formed in the positions, located below the ejection holes, of the operation table, mounting tables are fixedly arranged at the lower ends, located in the mounting grooves, of the electric push rods, third hydraulic telescopic devices are fixedly arranged at the lower ends of the mounting tables, and the third hydraulic telescopic devices are fixedly connected with the inner walls of the mounting grooves. The structure solves the problems that the ejection device is easy to damage the workpiece and the workpiece is difficult to be directly taken out from the fixed mold after being ejected.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to an injection mold facilitating ejection and mold opening. Background Technique

[0002] An injection mold is a professional tool used in the injection molding process, mainly composed of a moving mold and a fixed mold. These two parts are accurately positioned and guided through guide pillars and guide sleeves to ensure the accuracy and stability during mold closing. During the injection process, molten plastic is injected into the cavity of the mold. After the plastic cools and solidifies, a plastic product with the same shape as the cavity can be obtained. The cavity design of the injection mold is usually determined according to the shape and size of the product, and the manufacturing precision and surface roughness of the mold have a crucial impact on the quality and precision of the injection molded parts. Among them, the mold is equipped with an ejection system for ejecting the product from the mold after injection molding.

[0003] For example, the Chinese patent "An injection mold facilitating mold opening and ejection" with the publication number CN213972362U includes a bottom plate, a lower mold, an upper mold, and a top plate. The lower mold is fixedly connected to the bottom plate, the upper mold is located on the lower mold, the top plate is fixedly connected to the top of the upper mold, a first ejection structure is arranged inside the upper mold, and a second ejection structure is arranged inside the lower mold; the first ejection structure includes: a first spring, a first push plate, a pair of first push rods, and an upper ejector rod; the first spring is fixedly connected to the inner wall above the cavity of the upper mold, and the first push plate is fixedly connected below the first spring.

[0004] Although the above-mentioned prior art can achieve ejection and mold opening, in actual use, on the one hand, the ejection device is likely to damage the workpiece. When ejecting the workpiece, the workpiece is ejected from the fixed mold through the hydraulic expansion and contraction, resulting in excessive force when the hydraulic expansion and contraction device ejects the workpiece and causing damage to the workpiece, thereby reducing the quality of the workpiece. On the other hand, it is difficult to directly remove the workpiece from the fixed mold after the workpiece is ejected. After the workpiece is ejected from the fixed mold, it is necessary to wait for the workpiece to cool before the operator can remove the workpiece from the fixed mold, resulting in the operator having to wait for the workpiece to cool, thereby reducing the production efficiency of the workpiece. Therefore, it does not meet the existing requirements, and for this reason, we propose an injection mold facilitating ejection and mold opening. Content of the Utility Model

[0005] The purpose of the utility model is to provide an injection mold facilitating ejection and mold opening to solve the problems that the ejection device is likely to damage the workpiece and it is difficult to directly remove the workpiece from the fixed mold as mentioned in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: An injection mold facilitating ejection and mold opening, including a frame, and there are two frames, and an operating table is fixedly arranged at the upper end of the frame; it also includes:

[0007] The fixed mold is arranged at the middle position on the upper end of the operating table. There are eight ejector holes arranged at equal intervals at the lower end inside the fixed mold. An electric push rod is arranged inside the ejector holes, and there are four fixed mold grooves arranged at the upper end inside the fixed mold, and the fixed mold grooves communicate with the ejector holes;

[0008] The installation grooves are arranged inside the operating table below the ejector holes. There are eight installation grooves, and the fixed ends of the electric push rods extend into the installation grooves. An installation table is fixedly arranged at the lower end of the electric push rod inside the installation groove, and a third hydraulic telescopic device is fixedly arranged at the lower end of the installation table, and the third hydraulic telescopic device is fixedly connected with the inner wall of the installation groove.

[0009] Preferably, first hydraulic telescopic devices are fixedly arranged at the four corner positions on the upper end of the operating table, and a moving seat is fixedly arranged at the upper end of the first hydraulic telescopic devices.

[0010] Preferably, four connecting rods are arranged at the lower end of the moving seat close to the inner side of the first hydraulic telescopic device, and the connecting rods are arranged at equal intervals. A fixed seat is fixedly arranged at the lower end of the connecting rods, and the middle position of the fixed seat is of a hollow structure.

[0011] Preferably, moving rods are arranged on both sides of the middle position of the fixed seat. A vacuum suction cup is fixedly arranged at the lower end of the moving rod, and the vacuum suction cup extends below the fixed seat.

[0012] Preferably, sliding grooves are arranged at the front and rear ends inside the fixed seat. Fixed rods are fixedly arranged at the front and rear ends of the moving rod, and the fixed rods extend into the sliding grooves. Pulleys are arranged outside the fixed rods inside the sliding grooves, and the pulleys are rotatably connected with the fixed rods. Second hydraulic telescopic devices are fixedly arranged on both sides outside the fixed seat, and the telescopic ends of the second hydraulic telescopic devices extend into the fixed seat and are fixedly connected with the moving rods.

[0013] Preferably, a rubber block is arranged at the upper end of the telescopic end of the electric push rod inside the ejector hole, and the rubber block is hot-pressed and connected with the telescopic end of the electric push rod.

[0014] Preferably, four moving molds are fixedly arranged at the middle position of the lower end of the moving seat, and the moving molds correspond to the positions of the fixed mold grooves.

[0015] Compared with the prior art, the beneficial effects of the present utility model are:

[0016] 1. The utility model can perform secondary ejection on the workpiece through the electric push rod and the third hydraulic telescopic device. When ejecting the workpiece, first turn on the electric push rod to make the telescopic end of the electric push rod move upward until the rubber block on the electric push rod ejects a part of the workpiece out of the fixed mold groove. At this time, then turn on the third hydraulic telescopic device to make the telescopic end of the third hydraulic telescopic device drive the electric push rod to move upward together through the installation table until the telescopic end of the third hydraulic telescopic device ejects most of the workpiece out of the fixed mold groove, avoiding damage to the workpiece due to excessive force during a single ejection, thereby improving the quality of the workpiece.

[0017] 2. The utility model can take out the workpiece from the fixed mold through the vacuum chuck and the moving rod. When the workpiece is completed and ejected, at this time, turn on the second hydraulic telescopic device to make the telescopic end of the second hydraulic telescopic device extend. While the telescopic end of the second hydraulic telescopic device is extending, it drives the moving rod to move in the sliding groove until the moving rod moves to a suitable position. Then turn on the first hydraulic telescopic device to make the telescopic end of the first hydraulic telescopic device contract. Through the contraction of the telescopic end of the first hydraulic telescopic device, the moving rod together with the vacuum chuck moves downward until the vacuum chuck contacts and adsorbs the workpiece. At this time, then make the vacuum chuck drive the workpiece to move upward through the first hydraulic telescopic device. Finally, the operator uses tools to remove the workpiece on the vacuum chuck, avoiding the need to wait for the workpiece to cool before taking it out of the fixed mold, thereby accelerating the production rate of the workpiece.

[0018] 3. The utility model is provided with a rubber block to protect the workpiece when it is ejected. When ejecting the workpiece, at this time, drive the rubber block to move upward through the telescopic end of the electric push rod until the rubber block contacts and presses the workpiece. Continue to make the rubber block move upward until the workpiece is ejected out of the fixed mold groove. The rubber block has good elasticity and buffering performance. When the telescopic end of the electric push rod contacts the workpiece, the rubber block can absorb part of the impact force and reduce the damage to the workpiece, thereby protecting the surface of the workpiece from being scratched. Description of the Drawings

[0019] Figure 1 is the front view of the internal structure of the utility model;

[0020] Figure 2 is the side view of the internal structure of the utility model;

[0021] Figure 3 is of the utility model Figure 1 partial enlarged view of area A;

[0022] Figure 4 is of the utility model Figure 2 partial enlarged view of area B.

[0023] In the figure: 1, frame; 2, operation table; 3, moving seat; 4, first hydraulic telescopic device; 5, connecting rod; 6, fixed seat; 7, second hydraulic telescopic device; 8, chute; 9, moving rod; 10, fixed rod; 11, pulley; 12, vacuum suction cup; 13, moving mold; 14, fixed mold; 15, fixed mold groove; 16, third hydraulic telescopic device; 17, installation table; 18, installation groove; 19, electric push rod; 20, ejection hole; 21, rubber block. Specific embodiments

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0025] Please refer to Figures 1-4 , an embodiment provided by the present invention: an injection mold facilitating ejection and mold opening, including a frame 1, and there are two frames 1. An operation table 2 is fixedly arranged at the upper end of the frame 1; further including:

[0026] A fixed mold 14, which is arranged at the middle position at the upper end of the operation table 2. There are eight ejection holes 20 arranged at the lower end inside the fixed mold 14, and the ejection holes 20 are equally spaced. An electric push rod 19 is arranged inside the ejection holes 20. There are four fixed mold grooves 15 arranged at the upper end inside the fixed mold 14, and the fixed mold grooves 15 communicate with the ejection holes 20;

[0027] An installation groove 18, which is arranged inside the operation table 2 below the ejection holes 20. There are eight installation grooves 18, and the fixed end of the electric push rod 19 extends into the installation groove 18. An installation table 17 is fixedly arranged at the lower end inside the installation groove 18 where the electric push rod 19 is located. A third hydraulic telescopic device 16 is fixedly arranged at the lower end of the installation table 17, and the third hydraulic telescopic device 16 is fixedly connected to the inner wall of the installation groove 18.

[0028] During use, when ejecting the workpiece, first turn on the electric push rod 19 to make the telescopic end of the electric push rod 19 move upward until the rubber block 21 on the electric push rod 19 ejects a part of the workpiece out of the fixed mold groove 15. At this time, then turn on the third hydraulic telescopic device 16 to make the telescopic end of the third hydraulic telescopic device 16 drive the electric push rod 19 to move upward together through the installation table 17 until the telescopic end of the third hydraulic telescopic device 16 ejects most of the workpiece out of the fixed mold groove 15.

[0029] Please refer to Figure 1 , first hydraulic telescopic devices 4 are fixedly arranged at the four corner positions at the upper end of the operation table 2. A moving seat 3 is fixedly arranged at the upper end of the first hydraulic telescopic devices 4, which is convenient for moving the moving seat 3 in the vertical direction through the first hydraulic telescopic devices 4.

[0030] Please refer to Figure 1 , at the lower end near the inner side of the first hydraulic telescopic device 4 of the moving seat 3, four connecting rods 5 are provided, and the connecting rods 5 are equidistantly distributed. The lower ends of the connecting rods 5 are fixedly provided with fixing seats 6, and the middle position of the fixing seat 6 is of a hollow structure. When the fixing seat 6 moves downward during workpiece injection molding, the through hole in the middle will pass through the fixed mold 14, which is convenient for fixedly installing the fixing seat 6 through the connecting rods 5.

[0031] Please refer to Figure 1 , on both sides of the middle position of the fixing seat 6, moving rods 9 are provided. The lower ends of the moving rods 9 are fixedly provided with vacuum suction cups 12, and the vacuum suction cups 12 extend below the fixing seat 6, which is convenient for adsorbing workpieces through the vacuum suction cups 12.

[0032] Please refer to Figure 1 , Figure 2 and Figure 4 , at the front and rear ends inside the fixing seat 6, sliding grooves 8 are provided. At the front and rear ends of the moving rod 9, fixing rods 10 are fixedly provided, and the fixing rods 10 extend into the sliding grooves 8. Outside the fixing rods 10 located inside the sliding grooves 8, pulleys 11 are provided, and the pulleys 11 are rotatably connected to the fixing rods 10. On both sides outside the fixing seat 6, second hydraulic telescopic devices 7 are fixedly provided, and the telescopic ends of the second hydraulic telescopic devices 7 extend into the fixing seat 6 and are fixedly connected to the moving rods 9, which is convenient for driving the moving rods 9 to move in the sliding grooves 8 through the second hydraulic telescopic devices 7.

[0033] Please refer to Figure 1 and Figure 3 , at the upper end of the telescopic end of the electric push rod 19 located inside the ejection hole 20, a rubber block 21 is provided, and the rubber block 21 is heat-pressed to the telescopic end of the electric push rod 19, which is convenient for buffering the workpiece to a certain extent through the rubber block 21.

[0034] Please refer to Figure 1 , at the middle position of the lower end of the moving seat 3, four moving molds 13 are fixedly provided, and the moving molds 13 correspond to the fixed mold grooves 15, which is convenient for manufacturing multiple workpieces at one time through the cooperation of the moving molds 13 and the fixed mold grooves 15.

[0035] Working principle: After the workpiece is made and ejected, the second hydraulic telescopic device 7 is activated at this time, causing the telescopic end of the second hydraulic telescopic device 7 to extend. While the telescopic end of the second hydraulic telescopic device 7 is extending, it drives the moving rod 9 to move in the sliding groove 8. After the moving rod 9 moves to a suitable position, the first hydraulic telescopic device 4 is activated, causing the telescopic end of the first hydraulic telescopic device 4 to contract. Through the contraction of the telescopic end of the first hydraulic telescopic device 4, the moving rod 9 together with the vacuum suction cup 12 moves downward until the vacuum suction cup 12 contacts and adsorbs the workpiece. At this time, the first hydraulic telescopic device 4 is used to drive the workpiece to move upward together with the vacuum suction cup 12. Finally, the operator uses a tool to remove the workpiece on the vacuum suction cup 12. When the workpiece is ejected, at this time, the telescopic end of the electric push rod 19 drives the rubber block 21 to move upward until the rubber block 21 contacts and presses the workpiece, and continues to move the rubber block 21 upward until the workpiece is ejected from the fixed mold groove 15. The rubber block 21 has good elasticity and buffering performance. When the telescopic end of the electric push rod 19 contacts the workpiece, the rubber block 21 can absorb part of the impact force.

[0036] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. An injection mold that is convenient for ejection and mold opening, comprising a frame (1), wherein two frames (1) are provided, and an operating table (2) is fixedly provided at the upper end of the frame (1); Features: Also includes: A fixed mold (14) is arranged at the middle position of the upper end of the operating table (2); eight ejection holes (20) are arranged at the lower end inside the fixed mold (14), and the ejection holes (20) are evenly distributed; an electric push rod (19) is arranged inside the ejection holes (20); four fixed mold grooves (15) are arranged at the upper end inside the fixed mold (14), and the fixed mold grooves (15) are connected to the ejection holes (20); A mounting groove (18) is arranged inside the operating table (2) below the ejection hole (20), eight mounting grooves (18) are arranged, and the fixed end of the electric push rod (19) extends into the mounting groove (18), a mounting table (17) is fixedly arranged at the lower end of the electric push rod (19) located inside the mounting groove (18), a third hydraulic telescopic device (16) is fixedly arranged at the lower end of the mounting table (17), and the third hydraulic telescopic device (16) is fixedly connected to the inner wall of the mounting groove (18).

2. The injection mold for easy ejection and mold opening according to claim 1, characterized in that: A first hydraulic telescopic device (4) is fixedly arranged at the four corners of the upper end of the operating platform (2), and a movable seat (3) is fixedly arranged at the upper end of the first hydraulic telescopic device (4).

3. The injection mold for easy ejection and mold opening according to claim 2, characterized in that: The movable seat (3) is provided with four connecting rods (5) at the lower end close to the inner side of the first hydraulic telescopic device (4), and the connecting rods (5) are evenly distributed. A fixed seat (6) is fixedly provided at the lower end of the connecting rod (5), and the middle position of the fixed seat (6) is a hollow structure.

4. The injection mold for easy ejection and mold opening according to claim 3, characterized in that: Moving rods (9) are provided on both sides of the middle position of the fixed seat (6), and a vacuum suction cup (12) is fixedly provided at the lower end of the moving rod (9), and the vacuum suction cup (12) extends to the bottom of the fixed seat (6).

5. The injection mold for easy ejection and mold opening according to claim 4, characterized in that: The front and rear ends of the fixed seat (6) are both provided with slide grooves (8); the front and rear ends of the movable rod (9) are both fixedly provided with fixed rods (10), and the fixed rod (10) extends into the slide groove (8); the fixed rod (10) is provided with a pulley (11) outside the slide groove (8), and the pulley (11) is rotatably connected to the fixed rod (10); the second hydraulic telescopic device (7) is fixedly provided on both sides of the outside of the fixed seat (6), and the telescopic end of the second hydraulic telescopic device (7) extends into the interior of the fixed seat (6) and is fixedly connected to the movable rod (9).

6. The injection mold for easy ejection and mold opening according to claim 1, characterized in that: A rubber block (21) is provided at the upper end of the telescopic end of the electric push rod (19) located inside the ejection hole (20), and the rubber block (21) is hot-pressedly connected to the telescopic end of the electric push rod (19).

7. The injection mold for easy ejection and mold opening according to claim 2, characterized in that: Four movable molds (13) are fixedly arranged at the middle position of the lower end of the movable seat (3), and the positions of the movable molds (13) and the fixed mold grooves (15) correspond to each other.

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