Delayed mold opening mechanism of injection mold

Abstract

The utility model discloses a delayed mold opening mechanism of an injection mold, which comprises a front mold plate and a front mold fixing plate arranged on one side of the front mold plate, a shoveling machine is arranged on the front mold plate and comprises a fixing block and a connecting block, and a connecting hole capable of enabling the connecting block to pass through and moving is formed in a sliding block. A pushing inclined surface and a delay straight surface are sequentially arranged on one side of the connecting block, a pushing sliding surface matched with the pushing inclined surface and a sliding straight surface matched with the delay straight surface are arranged on the inner wall of the connecting hole, the pushing inclined surface is in sliding fit with the pushing sliding surface, so that the sliding block moves towards the mold core, and the delay straight surface and the sliding straight surface vertically slide; when the shoveling machine is pulled away, the sliding block is delayed to slide away from the mold core; through the mode, the mold opening can be delayed under the condition that an external opening and closing device is not used.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to a delayed mold opening mechanism for an injection mold. Background Art

[0002] After the conventional injection mold is closed, the shovel machine presses the slider to perform injection molding, such as Figure 1 As shown in the figure, when the mold is in the closed state, the slider is supported by the inclined surface of the shovel. Figure 2 As shown, when the front mold fixing plate moves and the shovel is pulled out, the slider will retreat under the action of the injection pressure in the mold cavity after the inclined surface of the shovel leaves. In order to delay the retreat of the slider and delay the mold opening after the shovel is pulled out, an external opener and closer is needed. However, the external opener and closer is not very reliable and increases the cost. Utility Model Content

[0003] The main technical problem solved by the utility model is to provide a delayed mold opening mechanism for an injection mold, which can achieve delayed mold opening without using an external opener or closer.

[0004] In order to solve the above technical problems, a technical solution adopted by the utility model is: to provide a delayed mold opening mechanism for an injection mold, comprising: a front template and a front mold fixing plate arranged on one side of the front template, a shovel is arranged on the front template, the shovel includes a fixed block and a connecting block, the slider is provided with a connecting hole that allows the connecting block to pass through and be movable, one side of the connecting block is sequentially provided with a pushing inclined surface and a delay straight surface, the inner wall of the connecting hole is provided with a pushing sliding surface matching the pushing inclined surface and a sliding straight surface matching the delay straight surface, the pushing inclined surface and the pushing sliding surface are slidably matched to make the slider move toward the mold core, the delay straight surface and the sliding straight surface slide vertically, so that when the shovel is withdrawn, the slider is delayed to slide away from the mold core.

[0005] Preferably, a spring is provided between the front mold fixing plate and the front mold plate.

[0006] Preferably, a spring groove that matches the spring is provided on the opposite side of the front mold fixing plate and / or the front mold plate.

[0007] Preferably, a guide post is provided on the front mold fixing plate, and a guide sleeve that slides with the guide post is provided on the front mold plate.

[0008] Preferably, the front mold plate is provided with a positioning column facing the front mold fixing plate, and the front mold fixing plate is provided with a positioning hole matched with the positioning column.

[0009] Preferably, a mounting groove that matches the fixing block of the shovel is provided on the front mold fixing plate, and the shovel is installed in the mounting groove through the fixing block.

[0010] The beneficial effects of the present utility model are as follows: by providing a pushing inclined surface on the side of the shovel and providing a corresponding pushing sliding surface in the connecting hole, the shovel can push the slider toward the mold core; by providing a delay straight surface on the same side of the shovel and providing a corresponding sliding straight line in the connecting hole, the shovel can still resist the slider by utilizing the delay straight surface and the sliding straight surface to achieve the effect of delayed mold opening when the shovel is withdrawn. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the positional relationship between the shovel and the slider of an existing injection mold;

[0012] Figure 2 This is a schematic diagram showing the positional relationship between the slider and the shovel after the shovel of the existing injection mold is withdrawn and the slider moves backward;

[0013] Figure 3 This is a schematic diagram of the positional relationship between the shovel and the slider of the present invention when they abut against each other;

[0014] Figure 4 Figure 3 A magnified schematic diagram of the middle part A;

[0015] Figure 5 This is a schematic diagram of the positional relationship between the shovel and the slider when the shovel is pulled out of the utility model;

[0016] Figure 6 yes Figure 5 Enlarged schematic diagram of middle part B;

[0017] Figure 7 It is a schematic diagram of the exploded structure of the present invention.

[0018] The markings of the components in the accompanying drawings are as follows:

[0019] 1. Front mold plate; 11. Positioning column; 2. Front mold fixing plate; 3. Guide column; 4. Shovel; 41. Fixing block; 42. Connecting block; 421. Pushing inclined surface; 422. Delaying straight surface; 423. Mold opening inclined surface; 6. Slider; 61. Connecting hole; 611. Pushing sliding surface; 612. Sliding straight surface; 7. Spring; 9. Mold core. DETAILED DESCRIPTION

[0020] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0021] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0023] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0024] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0025] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0026] Physical quantities in formulas, unless otherwise specified, should be understood as basic quantities of the International System of Units (SI) basic units, or derived quantities derived from basic quantities through mathematical operations such as multiplication, division, differentiation or integration.

[0027] Example:

[0028] refer to Figure 3-Figure 7 , a delayed mold opening mechanism for an injection mold, comprising: a front template 1 and a front mold fixing plate 2 arranged on one side of the front template 1, a guide column 3 fixedly connected to the front template 1, and a guide sleeve slidingly matched with the guide column 3 is installed on the front template 1, so that the front mold fixing plate 2 can move in the vertical direction relative to the front template 1, and then the front mold fixing plate 2 can press the front template 1 or no longer press the front template 1. When injection molding is required, the front mold fixing plate 2 is pressed on the front template 1. When injection molding is completed, the front mold fixing plate 2 no longer presses the front template 1, that is, the front mold fixing plate 2 moves slightly away from the front template 1.

[0029] refer to Figure 3-Figure 7The front template 1 is bolted with a shovel 4, and the front template fixing plate 2 is provided with a mounting groove that matches the fixing block 41 of the shovel 4. The shovel 4 is bolted to the mounting groove through the fixing block 41. The shovel 4 includes an integrally formed fixing block 41 and a connecting block 42. The slider 6 is provided with a connecting hole 61 that allows the connecting block 42 to pass through and be able to move. The side of the connecting block 42 close to the mold core 9 is provided with a pushing inclined surface 421 and a delay straight surface 422. The inner wall of the connecting hole 61 is provided with a pushing sliding surface 611 that matches the pushing inclined surface 421 and a sliding straight surface that matches the delay straight surface 422. The surface 612 pushes the inclined surface 421 and the push sliding surface 611 to slide together, so that the slider 6 moves toward the mold core 9. After the slider 6 moves into position toward the mold core 9, injection molding can begin; the delay surface 422 slides vertically with the sliding surface 612, so that when the shovel 4 is pulled away vertically relative to the front template 1, the part of the sliding surface 612 can also be used to press against the slider 6, thereby delaying the slider 6 from sliding away from the mold core 9, avoiding forcing the slider 6 to retreat (i.e., move away from the mold core 9) under the action of the injection pressure, thereby achieving the effect of delayed mold opening without using an external opener. The length of the delay surface 422 determines the delay time, that is, the length of the delay surface 422 is proportional to the delay time. When the delay surface 422 no longer conflicts with the sliding surface 612 of the slider 6, the slider 6 moves away from the mold core 9 under the action of the injection pressure.

[0030] refer to Figure 3-Figure 7 The end of the delay surface 422 away from the pushing inclined surface 421 can be connected to the mold opening inclined surface 423, so that when the delay surface 422 is no longer in contact with the slider 6, the mold opening inclined surface 423 reaches the pushing inclined surface 421 and there is a certain gap, thereby providing space for the movement of the slider 6 while limiting the maximum movement range of the slider 6.

[0031] refer to Figure 3-Figure 7 A spring 7 is placed between the front mold fixing plate 2 and the front mold plate 1, and a spring 7 groove that cooperates with the spring 7 is opened on the opposite side of the front mold fixing plate 2 and / or the front mold plate 1, so as to facilitate stabilizing the position of the spring 7, and the front mold plate 1 is pressed by the spring 7 to maintain the pressure of the front mold fixing plate 2 on the front mold plate 1.

[0032] refer to Figure 3-Figure 7 The front template 1 is installed with a positioning column 11 facing the front template fixing plate 2. The front template fixing plate 2 is provided with a positioning hole that cooperates with the positioning column 11. The accuracy of the position between the front template fixing plate 2 and the front template 1 is ensured by the cooperation between the positioning column 11 and the positioning hole.

[0033] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A delayed mold opening mechanism for an injection mold, characterized in that: include: A front template (1) and a front template fixing plate (2) arranged on one side of the front template (1); a shovel (4) is arranged on the front template (1); the shovel (4) includes a fixing block (41) and a connecting block (42); a slider (6) is provided with a connecting hole (61) that allows the connecting block (42) to pass through and move; a push inclined surface (421) and a delay straight surface (422) are sequentially provided on one side of the connecting block (42); an inner wall of the connecting hole (61) is provided with a push sliding surface (611) matched with the push inclined surface (421) and a sliding straight surface (612) matched with the delay straight surface (422); the push inclined surface (421) and the push sliding surface (611) are slidably matched to move the slider (6) toward the mold core (9); the delay straight surface (422) and the sliding straight surface (612) slide vertically, so that when the shovel (4) is withdrawn, the slider (6) is delayed in sliding away from the mold core (9).

2. The delayed mold opening mechanism for an injection mold according to claim 1, characterized in that: A spring (7) is provided between the front mold fixing plate (2) and the front mold plate (1).

3. The delayed mold opening mechanism for an injection mold according to claim 2, characterized in that: A spring (7) groove that matches the spring (7) is provided on the opposite side of the front mold fixing plate (2) and / or the front mold plate (1).

4. The delayed mold opening mechanism for an injection mold according to claim 1, characterized in that: The front mold fixing plate (2) is provided with a guide column (3), and the front mold plate (1) is provided with a guide sleeve that is slidably matched with the guide column (3).

5. The delayed mold opening mechanism for an injection mold according to claim 1, characterized in that: The front mold plate (1) is provided with a positioning column (11) facing the front mold fixing plate (2), and the front mold fixing plate (2) is provided with a positioning hole that matches the positioning column (11).

6. The delayed mold opening mechanism for an injection mold according to claim 1, characterized in that: The front mold fixing plate (2) is provided with a mounting groove matched with a fixing block (41) of the shovel machine (4), and the shovel machine (4) is installed in the mounting groove via the fixing block (41).

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