Injection mold with linkage structure

Abstract

The utility model provides an injection mold with a linkage structure, which comprises a bottom plate and a top plate, and a guide post is arranged between the bottom plate and the top plate. The mold has the advantages that when the mold is closed, the guide plate guides the connecting plate, so that the connecting plate drives the forming plates to move towards the two sides, the compensation plate is inserted between the two forming plates, and the forming plates and the compensation plate jointly form a width surface of a mobile phone shell. A gap is formed between the forming plate and the movable frame after the forming plate moves towards the two sides, and conditions are provided for forming of the inverted buckling edge of the mobile phone shell. When the mold is opened, the second spring supports the connecting plate, and after the constraint effect of the guide plate on the connecting plate disappears, the connecting plate drives the forming plate to move towards the middle under the pushing of the second spring, so that the inverted buckling edge of the mobile phone shell is separated from the forming plate, and the mobile phone shell can be conveniently taken down from the mold. And the back-off edge of the mobile phone shell is not restrained during discharging, so that the problem that the back-off edge is damaged is avoided, and the product quality can be improved.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, and in particular to an injection mold with a linkage structure. Background Technology

[0002] Injection molds are tools used to produce plastic products. They inject molten plastic material under high pressure into a mold cavity, where it cools and solidifies to produce a plastic product with a complete structure and precise dimensions. Injection molds are widely used to produce various plastic parts and products, and are particularly suitable for mass production of products with complex geometries and high precision requirements.

[0003] In existing technology, during the injection molding of mobile phone cases, since mobile phone cases generally have undercut edges, the mold typically incorporates an undercut edge structure within the cavity to achieve the injection molding purpose. After injection molding, a robotic gripper removes the mobile phone case from the mold. However, due to the presence of the undercut edges, when the robotic gripper removes the mobile phone case, the undercut edges may become stuck on the mold, and forcibly removing the mobile phone case may damage the undercut edges. Therefore, an injection mold with a linkage structure is proposed as an improvement. Utility Model Content

[0004] The purpose of this invention is to at least solve one of the aforementioned technical defects.

[0005] Therefore, one objective of this utility model is to propose an injection mold with a linkage structure to solve the problems mentioned in the background art and overcome the shortcomings of the existing technology.

[0006] To achieve the above objectives, one embodiment of the present invention provides an injection mold with a linkage structure, including a bottom plate and a top plate, a guide post between the bottom plate and the top plate, a moving mold on the guide post, a fixed mold on the top plate, a first spring inside the moving mold, a movable frame fixedly connected to one end of the first spring, a second spring fixedly connected to both sides of the inner wall of the movable frame, a connecting plate fixedly connected to the end of the second spring, and a molding plate fixedly connected to the top of the connecting plate;

[0007] A compensation plate that can be inserted between two forming plates is fixedly connected inside the moving mold. The compensation plate has guide plates with inclined surfaces on its top surface that are fixedly connected to the moving mold on both sides. Both the compensation plate and the guide plates are inserted into the movable frame. A push rod that is inserted into the moving mold is fixedly connected to the bottom plate.

[0008] Preferably, in any of the above embodiments, the moving mold has an inverted T-shaped cavity on its inner side, and the fixed mold has an injection port.

[0009] Preferably, in any of the above embodiments, a constraint rod is fixedly connected to the inner side of the moving mold, the first spring is sleeved on the constraint rod, and the constraint rod is inserted into the movable frame.

[0010] The above technical solution employs a base plate, top plate, guide pillars, moving mold, and fixed mold to form the basic structure of an injection mold, providing conditions for injection molding. The moving mold is driven by a drive assembly to move along the guide pillars, cooperating with the fixed mold to achieve mold opening and closing. During mold closing, the gap between the two forms a cavity, through which the injection material enters and cools to solidify. The drive assembly then moves the moving mold to separate it from the fixed mold, exposing the product within the cavity for ejection. A first spring is installed within the moving mold to support the movable frame. A constraint rod is also installed within the moving mold to constrain the first spring and the movable frame, preventing displacement in other directions.

[0011] Preferably, of any of the above schemes, there are several first springs evenly arranged in the moving mold, and several second springs evenly arranged on the inner side of the movable frame.

[0012] Preferably, in any of the above solutions, the connecting plate and the forming plate form a T-shaped structure, and the bottom edge of the forming plate near the compensation plate is rounded.

[0013] The above technical solution employs the following: Several first springs, evenly arranged within the moving mold, provide stable and balanced support for the movable frame. The movable frame, together with the molding plate and compensating plate, forms a cavity with the fixed mold, providing conditions for the injection molding of the phone case. A second spring is installed within the movable frame, providing elastic support for the connecting plate and molding plate, allowing them to move to a certain extent under external force. During mold closing, the compensating plate is inserted between the two molding plates, causing the molding plates to move to both sides, forming the width surface of the phone case together with the compensating plate. The gap between the molded plates and the movable frame after moving to both sides provides conditions for the formation of the undercut edge of the phone case. Rounding the bottom edge of the molding plate allows the compensating plate to smoothly insert between the two molding plates during mold opening.

[0014] Preferably, in any of the above schemes, the compensation plate is positioned in the middle of the moving mold, and the guide plate is provided with a first straight section, an inclined section, and a second straight section from top to bottom.

[0015] Preferably, in any of the above schemes, there are several top rods, and the several top rods are evenly arranged on the base plate.

[0016] The above technical solution involves: a guide plate within the moving mold. During mold closing, the guide plate guides the connecting plate, causing it to move the molding plate to both sides, creating the undercut edge of the phone case within the cavity. During mold opening, a second spring supports the connecting plate. Once the guide plate's constraint on the connecting plate disappears, the connecting plate, pushed by the second spring, moves the molding plate towards the center, causing the undercut edge of the phone case to detach from the molding plate. This allows for easy removal of the phone case from the mold. An ejector rod is used to move the movable frame relative to the moving mold.

[0017] Compared with the prior art, the advantages and beneficial effects of this utility model are as follows:

[0018] 1. This injection mold with a linkage structure, through the inclusion of a first spring, a movable frame, a second spring, a connecting plate, a molding plate, a compensating plate, a guide plate, and an ejector pin, allows the mold to be easily removed from the mold during mold closing. During mold closing, the guide plate guides the connecting plate, causing it to move the molding plate to both sides. The compensating plate is inserted between the two molding plates, and together they form the width of the phone case. A gap appears between the molded plate and the movable frame after the mold moves to both sides, providing conditions for the formation of the undercut edge of the phone case. Injection molding can then be performed using an injection molding machine. During mold opening, the second spring supports the connecting plate. When the constraint of the guide plate on the connecting plate disappears, the connecting plate, pushed by the second spring, moves the molding plate towards the center, causing the undercut edge of the phone case to detach from the molding plate. This allows for easy removal of the phone case from the mold. Since the undercut edge of the phone case is not constrained during ejection, damage to the undercut edge is avoided, thus improving product quality.

[0019] 2. This injection mold with a linkage structure has constraint rods installed in the moving mold. These constraint rods constrain the first spring and the movable frame, preventing them from displacing in other directions. Several first springs evenly arranged in the moving mold provide stable and balanced support for the movable frame. Rounding the edges of the bottom surface of the molding plate allows the compensation plate to smoothly insert between the two molding plates during mold opening.

[0020] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0022] Figure 1 This is a schematic diagram of the mold closing mechanism of this utility model;

[0023] Figure 2 This is a schematic diagram of the structure of the present invention during mold opening.

[0024] In the diagram: 1-base plate, 2-top plate, 3-guide pillar, 4-moving mold, 5-fixed mold, 6-first spring, 7-moving frame, 8-second spring, 9-connecting plate, 10-forming plate, 11-compensation plate, 12-guide plate, 13-ejector rod. Detailed Implementation

[0025] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0026] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] like Figures 1-2 As shown, this utility model includes a base plate 1 and a top plate 2. A guide post 3 is provided between the base plate 1 and the top plate 2. A moving mold 4 is provided on the guide post 3. A fixed mold 5 is provided on the top plate 2. A first spring 6 is provided inside the moving mold 4. A movable frame 7 is fixedly connected to one end of the first spring 6. A second spring 8 is fixedly connected to both sides of the inner wall of the movable frame 7. A connecting plate 9 is fixedly connected to the end of the second spring 8. A forming plate 10 is fixedly connected to the top of the connecting plate 9.

[0028] A compensation plate 11 is fixedly connected inside the moving mold 4 and can be inserted between two molding plates 10. On both sides of the compensation plate 11, there are guide plates 12 with inclined surfaces on the top surface that are fixedly connected to the moving mold 4. Both the compensation plate 11 and the guide plates 12 are inserted into the movable frame 7. A push rod 13 inserted into the moving mold 4 is fixedly connected to the bottom plate 1.

[0029] Example 1: The moving mold 4 has an inverted T-shaped cavity on its inner side, and the fixed mold 5 has an injection port. A constraint rod is fixedly connected to the inner side of the moving mold 4, and a first spring 6 is sleeved on the constraint rod, which is inserted into the movable frame 7. The base plate 1, top plate 2, guide pillar 3, moving mold 4, and fixed mold 5 form the basic structure of the injection mold, providing conditions for injection molding. The moving mold 4 is driven by the drive assembly to move along the guide pillar 3, cooperating with the fixed mold 5 to realize the mold opening and closing actions. When the mold is closed, the gap between the two forms a cavity, and the injection material enters the cavity through the injection port, and then cools and solidifies. The drive assembly then moves the moving mold 4 to separate it from the fixed mold 5, exposing the product in the cavity for unloading. The first spring 6 is installed inside the moving mold 4, providing support for the movable frame 7. The constraint rod is installed inside the moving mold 4 to constrain the first spring 6 and the movable frame 7, preventing them from displacing in other directions.

[0030] Example 2: Several first springs 6 are evenly arranged within the moving mold 4, and several second springs 8 are evenly arranged within the movable frame 7. The connecting plate 9 and the molding plate 10 form a T-shaped structure, with rounded corners on the bottom edge of the molding plate 10 near the compensating plate 11. The several first springs 6 evenly arranged within the moving mold 4 provide stable and balanced support for the movable frame 7. The movable frame 7, together with the molding plate 10 and the compensating plate 11, forms a cavity with the fixed mold 5, providing conditions for the injection molding of the phone case. Second springs 8 are installed within the movable frame 7, providing elastic support for the connecting plate 9 and the molding plate 10, allowing them to move to a certain extent under external force. During mold closing, the compensating plate 11 is inserted between the two molding plates 10, causing the molding plates 10 to move to both sides, forming the width surface of the phone case together with the compensating plate 11. A gap appears between the molded plates 10 and the movable frame 7 after they move to both sides, providing conditions for the formation of the undercut edge of the phone case. Rounding the bottom edge of the molding plate 10 allows the compensation plate 11 to be smoothly inserted between the two molding plates during mold opening.

[0031] Example 3: The compensation plate 11 is positioned in the middle of the moving mold 4. The guide plate 12 has a first straight section, an inclined section, and a second straight section arranged sequentially from top to bottom. Several ejector pins 13 are evenly distributed on the base plate 1. The guide plate 12 is installed inside the moving mold 4. During mold closing, the guide plate 12 guides the connecting plate 9, causing it to move the molding plate 10 to both sides, creating the undercut edge of the phone case within the cavity. During mold opening, the second spring 8 supports the connecting plate 9. When the constraint of the guide plate 12 on the connecting plate 9 disappears, the connecting plate 9, pushed by the second spring 8, moves the molding plate 10 towards the center, causing the undercut edge of the phone case to detach from the molding plate 10, thus easily removing the phone case from the mold. The ejector pins 13 are used to push the movable frame 7 relative to the moving mold 4.

[0032] The working principle of this utility model is as follows:

[0033] S1. During mold closing, the guide plate 12 guides the connecting plate 9, causing the connecting plate 9 to move the molding plate 10 to both sides. The compensation plate 11 is inserted between the two molding plates 10, and the molding plate 10 and the compensation plate 11 together form the width surface of the phone case. After moving to both sides, a gap appears between the molding plate 10 and the movable frame 7, providing conditions for the formation of the undercut edge of the phone case. Then, the injection molding machine can be used for injection molding.

[0034] S2. When the mold is opened, the second spring 8 supports the connecting plate 9. When the constraint of the guide plate 12 on the connecting plate 9 is removed, the connecting plate 9 moves the molding plate 10 towards the middle under the push of the second spring 8, so that the undercut edge of the mobile phone case is separated from the molding plate 10, and the mobile phone case can be easily removed from the mold.

[0035] Compared with the prior art, the present invention has the following advantages:

[0036] 1. This injection mold with a linkage structure, through the arrangement of a first spring 6, a movable frame 7, a second spring 8, a connecting plate 9, a molding plate 10, a compensation plate 11, a guide plate 12, and an ejector rod 13, etc., allows the mold to be easily removed during mold closing. During mold closing, the guide plate 12 guides the connecting plate 9, causing it to move the molding plate 10 to both sides. The compensation plate 11 is inserted between the two molding plates 10, and together they form the width of the phone case. A gap appears between the molded plate 10 and the movable frame 7 after the molded plate 10 moves to both sides, providing conditions for the formation of the undercut edge of the phone case. Then, injection molding can be performed using an injection molding machine. During mold opening, the second spring 8 supports the connecting plate 9. When the constraint of the guide plate 12 on the connecting plate 9 disappears, the connecting plate 9, pushed by the second spring 8, moves the molding plate 10 towards the center, causing the undercut edge of the phone case to detach from the molding plate 10, thus allowing the phone case to be easily removed from the mold. The undercut edge of the phone case is not constrained during the material output process, which avoids the problem of damage to the undercut edge and helps improve product quality.

[0037] 2. This injection mold with a linkage structure has constraint rods installed inside the moving mold 4. These constraint rods constrain the first spring 6 and the movable frame 7, preventing them from displacing in other directions. Several first springs 6, evenly arranged inside the moving mold 4, provide stable and balanced support for the movable frame 7. Rounding the bottom edge of the molding plate 10 allows the compensation plate 11 to smoothly insert between the two molding plates during mold opening.

Claims

1. An injection mold with a linkage structure, comprising a base plate (1) and a top plate (2), wherein a guide post (3) is disposed between the base plate (1) and the top plate (2), a moving mold (4) is disposed on the guide post (3), and a fixed mold (5) is disposed on the top plate (2); characterized in that, The moving mold (4) is provided with a first spring (6), one end of the first spring (6) is fixedly connected to a movable frame (7), and both sides of the inner wall of the movable frame (7) are fixedly connected to a second spring (8). The end of the second spring (8) is fixedly connected to a connecting plate (9), and the top of the connecting plate (9) is fixedly connected to a forming plate (10). The moving mold (4) is fixedly connected to a compensation plate (11) that can be inserted between two forming plates (10). The compensation plate (11) has guide plates (12) with inclined surfaces on the top surface that are fixedly connected to the moving mold (4) on both sides. The compensation plate (11) and the guide plates (12) are both inserted into the movable frame (7). The bottom plate (1) is fixedly connected to a push rod (13) that is inserted into the moving mold (4).

2. The injection mold with a linkage structure as described in claim 1, characterized in that: The moving mold (4) has an inverted T-shaped cavity on its inner side, and the fixed mold (5) has an injection port.

3. The injection mold with a linkage structure as described in claim 2, characterized in that: A constraint rod is fixedly connected to the inner side of the moving mold (4), the first spring (6) is sleeved on the constraint rod, and the constraint rod is inserted into the movable frame (7).

4. The injection mold with a linkage structure as described in claim 3, characterized in that: There are several first springs (6) evenly arranged in the moving mold (4), and there are several second springs (8) evenly arranged inside the movable frame (7).

5. An injection mold with a linkage structure as described in claim 4, characterized in that: The connecting plate (9) and the forming plate (10) form a T-shaped structure, and the bottom edge of the forming plate (10) near the compensation plate (11) is rounded.

6. An injection mold with a linkage structure as described in claim 5, characterized in that: The compensation plate (11) is located in the middle of the moving mold (4), and the guide plate (12) is provided with a first straight section, an inclined section and a second straight section from top to bottom.

7. An injection mold with a linkage structure as described in claim 6, characterized in that: There are several top rods (13), and several top rods (13) are evenly arranged on the base plate (1).

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