Ejection device for injection mold

Abstract

The utility model discloses an ejection device for an injection mold, which comprises a base, a mold is arranged above the base, a mold cavity is arranged at the center of the upper end of the mold, an ejection hole is arranged at the bottom of the mold cavity, an ejection rod is arranged inside the ejection hole, a telescopic cavity is arranged at the lower end of the ejection rod, and an ejection rod is arranged in the telescopic cavity. A connecting rod is arranged below the ejector rod, a sliding groove is formed in the upper end of the base, a sliding seat is arranged above the base, one end of the sliding seat extends into the sliding groove, a mounting plate is arranged below the mold, and a connecting groove is formed in the upper end of the mounting plate. According to the ejection device, the multiple ejection rods are arranged at the bottom of the mold cavity at equal intervals, and the rising ejection rods are used for applying thrust from multiple parts of the bottom of a mold part, so that the mold part is effectively prevented from being damaged, the mold part is stably ejected out of the mold cavity, and the ejection efficiency of the injection mold is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to an ejection device for an injection mold. Background Art

[0002] An injection mold is a tool for producing plastic products; it is also a tool that gives plastic products a complete structure and precise dimensions. Injection molding is a processing method used in the mass production of certain parts with complex shapes. Specifically, it refers to the process of injecting heated and molten plastic into the mold cavity under high pressure by an injection molding machine, and obtaining a molded product after cooling and solidification.

[0003] The Chinese patent announcement number is CN217597725U, and the authorization announcement date is October 18, 2022. A rapid ejection device for an injection mold includes a lower mold base and an upper mold base, and also includes a lower mold, an upper mold and an ejection mechanism. The lower mold base is installed on the top of the lower mold base, and the upper mold is installed at the bottom of the upper mold base. The ejection mechanism is installed between the lower mold base and the upper mold base, and the ejection mechanism is composed of a connecting rod, a mounting plate, a ejector rod, a spring and a fixed plate. The bottom of the upper mold base is fixedly connected to a connecting rod that passes through the lower mold base; in the process of the upper mold moving down and closing the mold with the lower mold, the bottom of the connecting rod contacts the surface of the mounting plate and continues to press down until the mold closing is completed. At this time, the spring is compressed, and the mounting plate drives the ejector rod to lower the height so that the top of the ejector rod is flush with the bottom end of the lower mold. After the injection molding is completed, the upper mold moves up to open the mold, and the connecting rod moves away from the mounting plate. Under the action of the spring force, the mounting plate moves up, driving the ejector rod to move up to eject the workpiece, which is convenient for removal and improves the convenience of operation.

[0004] The existing injection mold ejection method manually removes the finished product from the mold. The mold fits tightly to the mold, which increases the difficulty of removing the material. Forcible removal can easily cause the mold to break and be damaged, reducing the injection mold ejection efficiency and failing to meet usage requirements. Utility Model Content

[0005] The purpose of the present utility model is to provide an ejection device for an injection mold, so as to solve the problem proposed in the above background technology that the existing injection mold ejection method manually removes the finished product from the inside of the mold, the mold is tightly fitted to the mold, which increases the difficulty of removing the material, and forcibly removing it easily causes the mold to be broken and damaged, thereby reducing the injection mold ejection efficiency and failing to meet the use requirements.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an ejection device for an injection mold, comprising a base, a mold is arranged above the base, support seats are arranged on both sides of the lower end of the mold, two support seats are provided, and the support seats are fixedly connected to the base and the mold, a mold cavity is provided at the center of the upper end of the mold, an ejection hole is provided at the bottom of the mold cavity, at least six ejection holes are provided, and the ejection holes are arranged in a ring at equal intervals at the bottom of the mold cavity, an ejection rod is provided inside the ejection hole, and the ejection rod is slidably connected to the mold, and a telescopic cavity is provided at the lower end of the ejection rod. A connecting rod is provided below the output rod, one end of the connecting rod extends to the interior of the telescopic cavity, and the connecting rod is slidably connected to the ejection rod, a slide groove is provided at the upper end of the base, a sliding seat is provided above the base, and two sliding seats are provided. One end of the sliding seat extends to the interior of the slide groove, and the sliding seat is slidably connected to the base. A mounting plate is provided below the mold, and a connecting groove is provided at the upper end of the mounting plate, and the other end of the connecting rod extends to the interior of the connecting groove. A linkage rod is provided between the two sliding seats and the mounting plate, and both ends of the linkage rod are rotatably connected to the mounting plate and the sliding seat respectively.

[0007] Preferably, a bidirectional screw is provided inside the slide groove, and the bidirectional screw is rotatably connected to the base, the bidirectional screw is threadedly connected to the sliding seat, an ejection motor is provided on one side of the support seat, and the ejection motor is connected to the support seat by screws, a first bevel gear and a second bevel gear are provided inside the slide groove, and the first bevel gear is meshed with the second bevel gear, the first bevel gear is connected to the output end of the ejection motor, and the second bevel gear is connected to one end of the bidirectional screw.

[0008] Preferably, a compression spring is provided inside the telescopic cavity, and two ends of the compression spring are fixedly connected to the ejection rod and the connecting rod respectively.

[0009] Preferably, the cross-sections of the ejection rod and the ejection hole are both trapezoidal.

[0010] Preferably, the cross section of the sliding seat is T-shaped, and two sliding seats are symmetrically arranged below the mounting plate.

[0011] Preferably, a threaded hole is provided at the lower end of the connecting rod, a connecting bolt is provided below the mounting plate, and one end of the connecting bolt passes through the mounting plate and extends to the inside of the threaded hole, and the connecting bolt is threadedly connected to the connecting rod.

[0012] Preferably, vibration motors are provided on both sides of the mold, and the vibration motors are connected to the mold by screws.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] The first gear is engaged with the second gear and the second gear is engaged with the first gear and the second gear is engaged with the first gear and the second gear is engaged with the first gear and the second gear is engaged with the first gear and the second gear is engaged with the first gear and the second gear is engaged with the first gear and the second gear is engaged with the first gear and the second gear.

[0015] 2. The utility model device is provided with a vibration motor, which drives the vibration of the mold. Under the action of the vibration force, resonance is generated between the injection molded part and the mold, which better separates the injection molded part from the mold and improves the ejection efficiency of the injection molded part. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a top view of the utility model;

[0018] Figure 3 This is a diagram of the connection structure between the ejection structure and the base of the utility model;

[0019] Figure 4 This is a diagram showing the connection between the mounting plate and the mold of the present utility model;

[0020] Figure 5 This is a diagram showing the connection between the ejector motor and the bidirectional screw rod of the present utility model.

[0021] In the figure: 1. Base; 2. Mold; 3. Mold cavity; 4. First bevel gear; 5. Support seat; 6. Vibration motor; 7. Ejector motor; 8. Mounting plate; 9. Sliding seat; 10. Slide groove; 11. Ejector rod; 12. Connecting rod; 13. Linking rod; 14. Bidirectional screw; 15. Second bevel gear; 16. Ejector hole; 17. Connecting groove; 18. Threaded hole; 19. Connecting bolt; 20. Telescopic cavity; 21. Compression spring. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0023] See also Figure 1-5 The utility model provides an embodiment: an ejection device for an injection mold, comprising a base 1, a mold 2 is arranged above the base 1, support seats 5 are arranged on both sides of the lower end of the mold 2, two support seats 5 are provided, and the support seats 5 are fixedly connected to the base 1 and the mold 2, a mold cavity 3 is provided at the center of the upper end of the mold 2, and an ejection hole 16 is provided at the bottom of the mold cavity 3. There are at least six ejection holes 16, and the ejection holes 16 are arranged in a ring at the bottom of the mold cavity 3 at equal distances. An ejection rod 11 is provided inside the ejection hole 16, and the ejection rod 11 is provided inside the ejection hole 16. The ejector rod 11 is slidably connected to the mold 2, and a telescopic cavity 20 is provided at the lower end of the ejector rod 11. A connecting rod 12 is provided below the ejector rod 11, and one end of the connecting rod 12 extends to the inside of the telescopic cavity 20, and the connecting rod 12 is slidably connected to the ejector rod 11. A slide groove 10 is provided at the upper end of the base 1, and a sliding seat 9 is provided above the base 1. The sliding seat 9 is provided with two, and one end of the sliding seat 9 extends to the inside of the slide groove 10, and the sliding seat 9 is slidably connected to the base 1. A mounting plate 8 is provided below the mold 2, and the upper end of the mounting plate 8 A connecting groove 17 is provided, and the other end of the connecting rod 12 extends to the inside of the connecting groove 17. A linkage rod 13 is provided between the two sliding seats 9 and the mounting plate 8, and the two ends of the linkage rod 13 are rotatably connected to the mounting plate 8 and the sliding seat 9 respectively. The cross-sections of the ejector rod 11 and the ejector hole 16 are both trapezoidal. A compression spring 21 is provided inside the telescopic cavity 20, and the two ends of the compression spring 21 are fixedly connected to the ejector rod 11 and the connecting rod 12 respectively. A bidirectional screw rod 14 is provided inside the slide 10, and the bidirectional screw rod 14 is connected to the base. 1 is rotated and connected, the bidirectional screw rod 14 is threadedly connected to the sliding seat 9, an ejection motor 7 is provided on one side of the support seat 5, and the ejection motor 7 is connected to the support seat 5 by screws, the first bevel gear 4 and the second bevel gear 15 are provided inside the slide groove 10, and the first bevel gear 4 is meshed with the second bevel gear 15, the first bevel gear 4 is connected to the output end of the ejection motor 7, and the second bevel gear 15 is connected to one end of the bidirectional screw rod 14, the cross section of the sliding seat 9 is T-shaped, and the two sliding seats 9 are symmetrically arranged below the mounting plate 8.

[0024] During use: turn on the ejection motor 7 to drive the first bevel gear 4 to rotate, and the first bevel gear 4 is meshed with the second bevel gear 15. As the first bevel gear 4 rotates, the bidirectional screw rod 14 is driven to rotate, and the bidirectional screw rod 14 is threadedly connected to the two sliding seats 9. As the bidirectional screw rod 14 rotates, the two sliding seats 9 are driven to move synchronously in the slide groove 10. The movement of the sliding seat 9 drives the linkage rod 13 to rotate, and then drives the mounting plate 8 to rise and fall. The ejection rod 11 and the connecting rod 12 constitute an ejection structure. The mounting plate 8 rises to apply an upward thrust to the ejection rod 11, and the ejection rod 11 applies a thrust to the injection molded part in the mold cavity 3 to eject the injection molded part. The ejection rod 11 is slidably connected to the connecting rod 12, and the compression spring 21 makes the ejection structure have a buffering effect. When the ejection rod 11 contacts the injection molded part, it retracts accordingly, which protects the injection molded part and improves the ejection effect of the injection molded part.

[0025] See also Figure 3 and Figure 4 A threaded hole 18 is provided at the lower end of the connecting rod 12, and a connecting bolt 19 is provided under the mounting plate 8, and one end of the connecting bolt 19 passes through the mounting plate 8 and extends to the inside of the threaded hole 18. The connecting bolt 19 is threadedly connected to the connecting rod 12, and the connecting bolt 19 fixes the connecting rod 12 and installs the connecting rod 12 and the mounting plate 8.

[0026] See also Figure 1 A vibration motor 6 is provided on both sides of the mold 2, and the vibration motor 6 is connected to the mold 2 by screws. The vibration motor 6 drives the vibration of the mold 2. Under the action of the vibration force, resonance is generated between the injection molded part and the mold 2, which better separates the injection molded part from the mold 2 and improves the ejection efficiency of the injection molded part.

[0027] Working principle: Turn on the ejection motor 7 to drive the first bevel gear 4 to rotate, and the first bevel gear 4 is meshed with the second bevel gear 15. As the first bevel gear 4 rotates, the bidirectional screw 14 is driven to rotate. The bidirectional screw 14 is threadedly connected to the two sliding seats 9. As the bidirectional screw 14 rotates, the two sliding seats 9 are driven to move synchronously in the slide groove 10. The movement of the sliding seat 9 drives the linkage rod 13 to rotate, and then drives the mounting plate 8 to rise and fall. The ejection rod 11 and the connecting rod 12 constitute the ejection structure. The mounting plate 8 rises to exert pressure on the ejection rod 11. With the upward thrust applied, the ejector rod 11 applies thrust to the injection molded part in the mold cavity 3 to eject the injection molded part. The ejector rod 11 is slidably connected to the connecting rod 12. The compression spring 21 makes the ejection structure have a buffering effect. When the ejector rod 11 contacts the injection molded part, it retracts accordingly, which protects the injection molded part and improves the ejection effect of the injection molded part. The vibration motor 6 is turned on to drive the vibration of the mold 2. Under the action of the vibration force, resonance is generated between the injection molded part and the mold 2, which better separates the injection molded part from the mold 2 and improves the ejection efficiency of the injection molded part.

[0028] The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0029] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An ejection device for an injection mold, comprising a base (1), characterized in that: A mold (2) is provided above the base (1), and support seats (5) are provided on both sides of the lower end of the mold (2), two support seats (5) are provided, and the support seats (5) are fixedly connected to the base (1) and the mold (2), a mold cavity (3) is provided at the center of the upper end of the mold (2), and an ejection hole (16) is provided at the bottom of the mold cavity (3), and at least six ejection holes (16) are provided, and the ejection holes (16) are arranged in a ring at equal intervals at the bottom of the mold cavity (3), an ejection rod (11) is provided inside the ejection hole (16), and the ejection rod (11) is slidably connected to the mold (2), a telescopic cavity (20) is provided at the lower end of the ejection rod (11), and a connecting rod (12) is provided below the ejection rod (11), and one end of the connecting rod (12) is provided. The end extends to the interior of the telescopic cavity (20), and the connecting rod (12) is slidably connected to the ejection rod (11). A slide groove (10) is provided at the upper end of the base (1), and a sliding seat (9) is provided above the base (1). There are two sliding seats (9), one end of the sliding seat (9) extends to the interior of the slide groove (10), and the sliding seat (9) is slidably connected to the base (1). A mounting plate (8) is provided below the mold (2), and a connecting groove (17) is provided at the upper end of the mounting plate (8), and the other end of the connecting rod (12) extends to the interior of the connecting groove (17). A linkage rod (13) is provided between the two sliding seats (9) and the mounting plate (8), and the two ends of the linkage rod (13) are rotatably connected to the mounting plate (8) and the sliding seat (9) respectively.

2. The ejector device for an injection mold according to claim 1, characterized in that: A bidirectional screw rod (14) is provided inside the chute (10), and the bidirectional screw rod (14) is rotatably connected to the base (1), and the bidirectional screw rod (14) is threadedly connected to the sliding seat (9), an ejection motor (7) is provided on one side of the support seat (5), and the ejection motor (7) is connected to the support seat (5) by screws, a first bevel gear (4) and a second bevel gear (15) are provided inside the chute (10), and the first bevel gear (4) and the second bevel gear (15) are meshed and connected, the first bevel gear (4) is connected to the output end of the ejection motor (7), and the second bevel gear (15) is connected to one end of the bidirectional screw rod (14).

3. The ejector device for an injection mold according to claim 1, characterized in that: A compression spring (21) is provided inside the telescopic cavity (20), and two ends of the compression spring (21) are fixedly connected to the ejection rod (11) and the connecting rod (12) respectively.

4. The ejector device for an injection mold according to claim 1, characterized in that: The cross sections of the ejection rod (11) and the ejection hole (16) are both trapezoidal.

5. The ejector device for an injection mold according to claim 1, characterized in that: The cross section of the sliding seat (9) is T-shaped, and two sliding seats (9) are symmetrically arranged below the mounting plate (8).

6. The ejector device for an injection mold according to claim 1, characterized in that: A threaded hole (18) is provided at the lower end of the connecting rod (12), and a connecting bolt (19) is provided below the mounting plate (8), and one end of the connecting bolt (19) passes through the mounting plate (8) and extends to the inside of the threaded hole (18), and the connecting bolt (19) is threadedly connected to the connecting rod (12).

7. The ejector device for an injection mold according to claim 1, characterized in that: Vibration motors (6) are provided on both sides of the mold (2), and the vibration motors (6) are connected to the mold (2) via screws.

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