Automatic resetting mechanism for top plate of injection mold

Abstract

The utility model discloses an automatic resetting mechanism for an injection mold top plate, relates to the technical field of resetting of the injection mold top plate, and solves the problems that when the device moves the top plate upwards, an ejector pin can enter the interior of a mold, but the top plate has the risk of colliding with the mold; the device comprises a mold and a top plate, a U-shaped seat is fixedly mounted on the bottom surface of the mold, the top plate is arranged between the U-shaped seat and the mold, ejector pins are symmetrically and fixedly mounted on the top surface of the top plate, and protective pads are slidably mounted on the outer side walls of the ejector pins in a sleeving manner. And a first buffer spring is fixedly installed on the bottom face of the protective pad and connected to the outer portion of the ejector pin in a sleeving mode, and through cooperation between the arranged first buffer spring and the protective pad, the ejector plate can be prevented from colliding with the mold when the ejector plate moves upwards.

Description

Technical Field

[0001] The utility model relates to the technical field of top plate resetting of an injection mold, in particular to an automatic top plate resetting mechanism for an injection mold. Background Art

[0002] Injection molding is also called injection molding, which is a molding method of injection and molding. After searching, the Chinese patent authorization number CN220146587U discloses an automatic reset mechanism for the top plate of the injection mold. In view of the problem that the top plate of the injection mold is connected with the top rod of the injection molding machine by screws during use, and the screws are fixedly installed on the screw clamping block, the life of the screws is limited as the use time increases, and it is not convenient to install when replacing them. Now the following scheme is proposed, which includes a bottom plate, a long hole is opened at the bottom of the bottom plate, a screw clamping block is arranged in the long hole, a mounting cavity is arranged in the screw clamping block, a mounting screw is arranged in the mounting cavity, a reset spring is fixedly connected to the top inner wall of the mounting cavity, a reset plate is fixedly connected to the bottom end of the reset spring, two slide grooves are arranged in the mounting cavity, a mounting mechanism is arranged in the mounting cavity, and an injection molding machine top rod is arranged on the mounting screw. The utility model has a simple structure, and through the mounting mechanism, it is convenient to install the mounting screws when replacing them, which is convenient for people to use. However, when the device moves the top plate upward, the ejector pin can enter the interior of the mold, but there is a risk that the top plate will collide with the mold. At the same time, when the top plate is reset, the screw block is likely to collide with the bottom plate, which may easily cause damage to the top plate if it occurs for a long time. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides an automatic resetting mechanism for the top plate of an injection mold, which solves the problem that when the device moves the top plate upward, the ejector pin can enter the interior of the mold, but there is a risk that the top plate will collide with the mold. At the same time, when the top plate is reset, the screw block is likely to collide with the bottom plate, which may easily cause damage to the top plate if this occurs for a long time.

[0004] To achieve the above purpose, the utility model is implemented through the following technical solutions: an automatic resetting mechanism for an injection mold top plate, comprising a mold and a top plate, a U-shaped seat is fixedly installed on the bottom surface of the mold, the top plate is arranged between the U-shaped seat and the mold, an ejector pin is symmetrically fixedly installed on the top surface of the top plate, a protective pad is slidably sleeved on the outer side wall of the ejector pin, a first buffer spring is fixedly installed on the bottom surface of the protective pad, the first buffer spring is sleeved on the outside of the ejector pin, and the bottom of the first buffer spring is fixedly connected to the top surface of the top plate.

[0005] Preferably, a movable hole is provided inside the bottom side wall of the U-shaped seat, and movable grooves are provided inside the side walls on both sides of the U-shaped seat, the side wall of the top plate is fixedly connected with a movable frame, and the movable frame is U-shaped, the side wall of the movable frame passes through the interior of the movable hole, and the side walls on both sides are slidably connected to the interior of the movable groove, so that when the top plate moves, the stability of the movement of the top plate can be maintained by the movable frame.

[0006] Preferably, an injection molding machine push rod is provided at the bottom of the movable frame, the top of the injection molding machine push rod is fixedly connected with a connecting column, and the side walls on both sides of the connecting column are respectively fixedly connected with connecting blocks, and a connecting groove is provided inside the bottom side wall of the movable frame, and a limiting circular groove is provided inside the connecting groove, the connecting column and the connecting block are slidably connected inside the connecting groove, and the connecting column is slidably connected inside the limiting circular groove, so that the injection molding machine push rod is connected to the limit position.

[0007] Preferably, second buffer springs are symmetrically fixedly installed on both sides of the bottom surface of the top plate, and the bottom of the second buffer spring is fixedly connected to the bottom surface in the U-shaped seat, thereby improving the buffer force when the top plate moves downward.

[0008] Preferably, the diameter of the limiting circular groove matches the distance between the two connecting blocks, so that the connecting column can be conveniently clamped inside the limiting circular groove.

[0009] The utility model provides an automatic reset mechanism for the top plate of an injection mold, which has the following beneficial effects:

[0010] 1. This automatic reset mechanism for the top plate of an injection mold can prevent the top plate from colliding with the mold when the top plate moves upward through the cooperation between the first buffer spring and the protective pad when the top plate is used;

[0011] 2. This automatic reset mechanism for the top plate of the injection mold, when in use, can slow down the downward movement rate of the top plate by providing a second tensioning spring when the top plate moves downward, thereby preventing the top plate from colliding with the side wall of the U-shaped seat, and protecting the top plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 This is a schematic diagram of the structure of the ejector rod of the injection molding machine of the utility model;

[0014] Figure 3 This is a schematic diagram of the structure of the mobile rack of the utility model.

[0015] In the figure, 1-mold, 2-U-shaped seat, 3-throw pin, 4-top plate, 5-first buffer spring, 6-movable frame, 7-second buffer spring, 8-movable hole, 9-movable groove, 10-injection molding machine ejector rod, 11-connecting column, 12-connecting block, 13-connecting groove, 14-limiting circular groove, 15-protective pad. DETAILED DESCRIPTION

[0016] 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.

[0017] Example 1

[0018] See also Figure 1-3 The embodiment of the utility model provides an automatic reset mechanism for the top plate of an injection mold, comprising a mold 1 and a top plate 4, a U-shaped seat 2 is fixedly installed on the bottom surface of the mold 1, the top plate 4 is arranged between the U-shaped seat 2 and the mold 1, an ejector pin 3 is symmetrically fixedly installed on the top surface of the top plate 4, a protective pad 15 is slidably sleeved on the outer side wall of the ejector pin 3, a first buffer spring 5 is fixedly installed on the bottom surface of the protective pad 15, the first buffer spring 5 is sleeved on the outside of the ejector pin 3, and the bottom of the first buffer spring 5 is fixedly connected to the top surface of the top plate 4, when the top plate 4 moves upward, in order to prevent the top plate 4 from colliding with the mold 1, the protective pad 15 will be pressed against the bottom surface of the mold 1, and the top plate 4 is prevented from colliding with the bottom surface of the mold 1 through the action of the first buffer spring 5.

[0019] Example 2

[0020] In this embodiment, Figure 1-3 As shown, a movable hole 8 is provided inside the bottom side wall of the U-shaped seat 2, and movable grooves 9 are provided inside the side walls on both sides of the U-shaped seat 2, the side wall of the top plate 4 is fixedly connected with a movable frame 6, and the movable frame 6 is U-shaped, the side wall of the movable frame 6 passes through the inside of the movable hole 8, and the side walls on both sides are slidably connected to the inside of the movable groove 9, when the automatic reset mechanism of the injection mold top plate is used.

[0021] Example 3

[0022] In this embodiment, Figure 1-3As shown, an injection molding machine push rod 10 is provided at the bottom of the movable frame 6, and a connecting column 11 is fixedly connected to the top of the injection molding machine push rod 10, and the side walls on both sides of the connecting column 11 are respectively fixedly connected with connecting blocks 12, and a connecting groove 13 is provided inside the bottom side wall of the movable frame 6, and a limiting circular groove 14 is provided inside the connecting groove 13, and the connecting column 11 and the connecting block 12 are slidably connected inside the connecting groove 13, and the connecting column 11 is slidably connected inside the limiting circular groove 14, so that the injection molding machine push rod 10 is connected to the inside of the connecting groove 13 through the connecting column 11, so that the injection molding machine push rod 10 can be easily disassembled.

[0023] Example 4

[0024] In this embodiment, Figure 1-3 As shown, second buffer springs 7 are symmetrically fixedly installed on both sides of the bottom surface of the top plate 4, and the bottom of the second buffer spring 7 is fixedly connected to the bottom surface of the U-shaped seat 2. When the top plate 4 moves downward, the second buffer spring 7 can easily slow down the impact force of the top plate 4 moving downward to prevent the top plate 4 from colliding with the U-shaped seat 2. The diameter of the limiting circular groove 14 matches the distance between the two connecting blocks 12.

[0025] It should be noted that, in this embodiment, when the automatic reset mechanism of the injection mold top plate is used, Figure 1-3 As shown, when the automatic reset mechanism of the injection mold top plate is used, the injection molding machine top rod 10 is connected to the inside of the connecting groove 13 through the connecting column 11, so that the injection molding machine top rod 10 can be easily disassembled. When the top plate 4 moves upward, the movable frame 6 is moved upward by the injection molding machine top rod 11, so that the top plate 4 moves upward. In order to prevent the top plate 4 from colliding with the mold 1, the protective pad 15 is pressed against the bottom surface of the mold 1. The first buffer spring 5 is used to prevent the top plate 4 from colliding with the bottom surface of the mold 1. When the top plate 4 moves downward, the second buffer spring 7 is used to easily slow down the impact force of the top plate 4 moving downward, and the top plate 4 is prevented from colliding with the U-shaped seat 2.

[0026] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0027] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An automatic reset mechanism for an injection mold top plate, characterized in that: The invention comprises a mould (1) and a top plate (4), wherein a U-shaped seat (2) is fixedly mounted on the bottom surface of the mould (1), the top plate (4) is arranged between the U-shaped seat (2) and the mould (1), an ejector pin (3) is symmetrically fixedly mounted on the top surface of the top plate (4), a protective pad (15) is slidably sleeved on the outer side wall of the ejector pin (3), a first buffer spring (5) is fixedly mounted on the bottom surface of the protective pad (15), the first buffer spring (5) is sleeved on the outside of the ejector pin (3), and the bottom of the first buffer spring (5) is fixedly connected to the top surface of the top plate (4).

2. According to claim 1, an automatic reset mechanism for the top plate of an injection mold, characterized in that: A moving hole (8) is provided inside the bottom side wall of the U-shaped seat (2), and moving grooves (9) are provided inside the side walls on both sides of the U-shaped seat (2). The side wall of the top plate (4) is fixedly connected to a moving frame (6), and the moving frame (6) is U-shaped. The side wall of the moving frame (6) passes through the inside of the moving hole (8), and the side walls on both sides are slidably connected to the inside of the moving groove (9).

3. According to claim 2, an automatic reset mechanism for the top plate of an injection mold, characterized in that: An injection molding machine top rod (10) is arranged at the bottom of the movable frame (6), a connecting column (11) is fixedly connected to the top of the injection molding machine top rod (10), and connecting blocks (12) are fixedly connected to the side walls on both sides of the connecting column (11), a connecting groove (13) is arranged inside the bottom side wall of the movable frame (6), and a limiting circular groove (14) is arranged inside the connecting groove (13), the connecting column (11) and the connecting block (12) are slidably connected inside the connecting groove (13), and the connecting column (11) is slidably connected inside the limiting circular groove (14).

4. The automatic reset mechanism for the top plate of an injection mold according to claim 1, characterized in that: Second buffer springs (7) are symmetrically fixedly mounted on both sides of the bottom surface of the top plate (4), and the bottom of the second buffer spring (7) is fixedly connected to the bottom surface inside the U-shaped seat (2).

5. The automatic reset mechanism for the top plate of an injection mold according to claim 3, characterized in that: The diameter of the limiting circular groove (14) matches the distance between the two connecting blocks (12).

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