Ejection type sliding block mold opening mechanism

Abstract

The utility model discloses an ejection type sliding block mold opening mechanism which is characterized in that the mechanism comprises an ejection column (1), the bottom end of the ejection column (1) is connected with a primary ejection plate (2), the primary ejection plate (2) is movably connected in a cavity between a bottom plate (3) and a movable mold plate, an L-shaped mold leg (4) is arranged between the bottom plate (3) and the movable mold plate, and the bottom plate (3) and the movable mold plate are movably connected through the L-shaped mold leg (4). A limiting step (5) is arranged on the L-shaped mold leg (4), a secondary ejection plate (6) is arranged above the primary ejection plate (2), the side edge of the secondary ejection plate (6) is arranged on the limiting step (5), the secondary ejection plate (6) is fixedly connected with the bottom end of an ejection rod (7), and the top end of the ejection rod (7) is located below the mold cavity.

Description

Technical Field

[0001] The utility model relates to the field of injection molding, in particular to an ejection type slide block mold opening mechanism. Background Art

[0002] When using injection molds to produce plastic products, some plastic products have undercut structures, which makes it impossible to directly eject the product from the cavity after the mold is opened. The conventional design method is to set a slider core-pulling mechanism at the undercut structure. The slider can slide with the mold opening action and be pulled out in a direction at a certain angle to the mold opening direction. However, these sliders are traditionally driven by inclined guide columns, which will cause the slider core-pulling mechanism to occupy a certain space in the mold and increase the overall cost of the mold. It is difficult to achieve under certain working conditions that have certain requirements on the overall space of the mold.

[0003] Therefore, a method or device capable of solving the above problems is now needed. Summary of the invention

[0004] The utility model aims to solve the above-mentioned deficiencies in the prior art and proposes an ejection-type slider mold opening mechanism which has a simple structure, ingenious design, and reasonable layout, and can drive the slider to move in a relatively narrow space to realize the core pulling action at the undercut without using an inclined guide column.

[0005] The technical solution of the utility model is: an ejection type slider mold opening mechanism, characterized in that: the mechanism includes an ejector column 1, the bottom end of the ejector column 1 is connected to a primary ejector plate 2, the primary ejector plate 2 is movably connected in a cavity between a bottom plate 3 and a movable template, an L-shaped mold leg 4 is arranged between the bottom plate 3 and the movable template, a limiting step 5 is arranged on the L-shaped mold leg 4, a secondary ejector plate 6 is arranged above the primary ejector plate 2, the side of the secondary ejector plate 6 is placed on the limiting step 5, the secondary ejector plate 6 is fixedly connected to the bottom end of an ejector rod 7, and the top end of the ejector rod 7 is located below the cavity,

[0006] A slider 8 is slidably connected to the movable template, and an insert portion 9 is provided at one end of the slider 8. In the mold closing state, the insert portion 9 is located in the cavity and forms a part of the cavity. A guide hole 10 is opened inside the slider 8, and a bell-shaped guide portion 11 is provided at the bottom end of the guide hole 10. A guide frustum 12 matching the guide portion 11 is provided at the top of the top column 1. A locking bevel 13 is provided on the side of the slider 8 away from the cavity, and a locking block 15 is fixedly provided on the fixed template 14, and a driving bevel 16 matching the locking bevel 13 is provided on the locking block 15.

[0007] Compared with the prior art, the utility model has the following advantages:

[0008] The ejection type slider mold opening mechanism of this structural form has a simple structure, ingenious design and reasonable layout. It designs a special structure to solve the problems existing in the traditional mechanism that uses inclined guide pillars to drive the slider movement. It sets two sets of ejection plate mechanisms at the bottom of the mold, one of which is used to drive the ejector column to move, and the other is used to drive the ejector rod to move. The top of the ejector column is provided with a guide round table, which matches the guide part opened at the bottom of the slider. In the process of one ejection, the ejector column moves upward and drives the slider to move backward. After the slider moves, a secondary ejection action can be performed. During the secondary ejection action, the ejector rod ejects the product from the cavity. This structure does not need to use an inclined guide column to drive the slider movement, and the slider is driven directly by the action of the ejector plate, so that the overall structure is more compact and small, does not need to occupy too much space, and can effectively control the overall cost of the mold. In addition, the manufacturing process of the mechanism is simple and the manufacturing cost is low. Therefore, it can be said that it has many advantages and is particularly suitable for promotion and application in this field. Its market prospects are very broad. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the structure of a workpiece to be processed in an embodiment of the utility model.

[0010] Figure 2 It is a structural schematic diagram of an embodiment of the utility model (mold closing state).

[0011] Figure 3 It is a structural schematic diagram of an embodiment of the utility model (mold opening state one).

[0012] Figure 4 It is a structural schematic diagram of an embodiment of the utility model (mold opening state two). DETAILED DESCRIPTION

[0013] The specific implementation of the present utility model will be described below in conjunction with the accompanying drawings. Figures 1 to 4 As shown: an ejection type slider mold opening mechanism, the mechanism includes an ejector column 1, the bottom end of the ejector column 1 is connected to a primary ejector plate 2, the primary ejector plate 2 is movably connected in a cavity between a bottom plate 3 and a movable mold plate, an L-shaped mold leg 4 is arranged between the bottom plate 3 and the movable mold plate, a limiting step 5 is arranged on the L-shaped mold leg 4, a secondary ejector plate 6 is arranged above the primary ejector plate 2, the side of the secondary ejector plate 6 is placed on the limiting step 5, the secondary ejector plate 6 is fixedly connected to the bottom end of an ejector rod 7, and the top end of the ejector rod 7 is located below the cavity,

[0014] A slider 8 is slidably connected to the movable template, and an insert portion 9 is provided at one end of the slider 8. In the mold closing state, the insert portion 9 is located in the cavity and forms a part of the cavity. A guide hole 10 is opened inside the slider 8, and a bell-shaped guide portion 11 is provided at the bottom end of the guide hole 10. A guide frustum 12 matching the guide portion 11 is provided at the top of the top column 1. A locking bevel 13 is provided on the side of the slider 8 away from the cavity, and a locking block 15 is fixedly provided on the fixed template 14, and a driving bevel 16 matching the locking bevel 13 is provided on the locking block 15.

[0015] The working process of the ejection type slider mold opening mechanism of the embodiment of the utility model is as follows: in the mold closing state, the slider 8 is in a position close to the mold cavity under the action of the locking block 15, at this time, the insert part 9 at the end of the slider 8 is located in the mold cavity and forms a part of the mold cavity, and the molding machine injects molten material into the mold cavity, and the material is cooled to form a product 17. The bottom of the product 17 close to the insert part 9 has an undercut structure, and it cannot be demolded directly from the mold opening direction when the insert part 9 exists;

[0016] After the mold is opened, the locking block 15 leaves the slider 8, and the slider 8 recovers its freedom. The molding machine drives the ejector plate 2 upward, and the ejector plate 2 drives the ejector column 1 upward. Since there is a guide truncated cone 12 at the top of the ejector column 1, the inclined side of the guide truncated cone 12 will squeeze the bell-shaped guide part 11. With the movement of the ejector column 1, the slider 8 will move in the direction away from the cavity under its action, realizing the lateral core pulling action;

[0017] In the above process, the primary ejector plate 2 moves, and the secondary ejector plate 6 does not move; the ejector column 1 moves relative to the secondary ejector plate 6;

[0018] When the primary ejector plate 2 moves to the position in contact with the secondary ejector plate 6, it pushes the secondary ejector plate 6 to move upward together, and the secondary ejector plate 6 drives the ejector rod 7 to eject the product from the cavity. Since there is no restriction of the undercut structure on the product at this time, it can be demoulded smoothly;

[0019] Before the next injection molding operation, the primary ejector plate 2 moves downward, driving the secondary ejector plate 6 to move together. When the edge of the secondary ejector plate 6 contacts the limiting step 5 on the L-shaped mold leg 4, the secondary ejector plate 6 is supported by the limiting step 5 and stops moving, and the primary ejector plate 2 continues to move downward until it returns to the initial position; during the mold closing process, the driving inclined surface 16 on the locking block 15 will squeeze the locking inclined surface 13 on the slider 8, pushing the slider 8 to move toward the direction of the cavity. In the fully closed mold state, the slider 8 moves to the initial position, and the insert part 9 at its end is located in the cavity and forms a part of the cavity, and the next injection molding operation can be carried out.

Claims

1. An ejection type slider mold opening mechanism, characterized in that: The mechanism comprises an ejector column (1), the bottom end of the ejector column (1) is connected to a primary ejector plate (2), the primary ejector plate (2) is movably connected in a cavity between a bottom plate (3) and a movable mold plate, an L-shaped mold leg (4) is provided between the bottom plate (3) and the movable mold plate, a limiting step (5) is provided on the L-shaped mold leg (4), a secondary ejector plate (6) is provided above the primary ejector plate (2), the side of the secondary ejector plate (6) is placed on the limiting step (5), the secondary ejector plate (6) is fixedly connected to the bottom end of an ejector rod (7), the top end of the ejector rod (7) is located below the mold cavity, A slider (8) is slidably connected to the movable mold plate, and an insert portion (9) is provided at one end of the slider (8). In a mold closing state, the insert portion (9) is located in the mold cavity and forms a part of the mold cavity. A guide hole (10) is opened inside the slider (8), and a bell-shaped guide portion (11) is provided at the bottom end of the guide hole (10). A guide round table (12) matching the guide portion (11) is provided at the top end of the top column (1). A locking inclined surface (13) is provided on the side of the slider (8) away from the mold cavity. A locking block (15) is fixedly provided on the fixed mold plate (14), and a driving inclined surface (16) matching the locking inclined surface (13) is provided on the locking block (15).

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