A mobile phone shell injection mold facilitating mold closing

Abstract

The utility model relates to the technical field of plastic forming mould, especially a mobile phone shell injection mould convenient to close mould, including the bottom plate, the lower end four corners of bottom plate all are fixedly connected with support rod, the lower end of four support rods all are fixedly connected with the foot stool, the upper end left part of bottom plate is fixedly connected with the lifting device, the right end of lifting device is clamped with mould device, a mobile phone shell injection mould convenient to close mould, through the T type sliding slot and T type sliding plate cooperation structure of lifting device, provide stable linear guide for the lifting of upper mould, avoid the deviation problem that traditional manual or simple guide structure is easy to appear, and simultaneously, the upper mould and lower mould are fixedly connected through the mounting plate and lifting block, ensure that the upper and lower mould always keep coaxial alignment during the lifting process, effectively eliminate the deviation of closing mould alignment, can significantly reduce the product flash, size out of tolerance problem caused by alignment inaccuracy.

Description

Technical Field

[0001] This utility model relates to the field of plastic molding die technology, and in particular to a mobile phone case injection mold that is easy to close. Background Technology

[0002] With the widespread use of smartphones, phone cases, as accessories for protecting and decorating phones, have a huge market demand. Their production mostly adopts injection molding technology. Injection molds are the core equipment for mass production of phone cases, and their mold closing accuracy and efficiency directly affect product quality (such as dimensional accuracy and surface finish) and production rhythm. The existing mobile phone case injection molds have the following problems: 1. Traditional molds rely on manual or simple guiding structures for mold closing, which can easily lead to misalignment of the upper and lower molds, resulting in flash, out-of-tolerance dimensions, or even damage to the mold cavity; 2. Some molds have simple fastening structures, which can easily create gaps after mold closing due to the injection pressure, leading to molten material leakage and increasing the scrap rate. Utility Model Content

[0003] The main purpose of this utility model is to provide a mobile phone case injection mold that is easy to close, which can effectively solve the problems in the background art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A mobile phone case injection mold that facilitates mold closing includes a base plate, with support rods fixedly connected to the four corners of the lower end of the base plate, and feet fixedly connected to the lower ends of the four support rods. A lifting device is fixedly connected to the upper left part of the base plate, and a mold device is engaged at the right end of the lifting device.

[0005] The mold device includes a mounting plate and a lower mold. Two screws are inserted and connected to the front and rear of the left end of the mounting plate. The four screws are threaded together to connect to the upper mold. An injection tube is inserted and fixedly connected to the upper end of the upper mold. A mobile phone case cavity is opened in the lower mold. Fastening components are fixedly connected to the three outer sides of the upper and lower molds. The lower end of the lower mold is fixedly connected to the upper end of the base plate.

[0006] Preferably, the upper mold and the lower mold are of the same shape and size.

[0007] The above solution ensures that the upper and lower molds are identical in shape and size, guaranteeing precise fit during mold closing, reducing alignment deviations, improving mold closing efficiency, and minimizing product defects caused by misalignment.

[0008] Preferably, the fastening assembly includes an upper connecting block and a lower connecting block. Both the upper and lower connecting blocks have through holes that pass through vertically. A threaded rod is inserted into both of the through holes. Fastening nuts are threaded onto the upper and lower parts of the outer surface of the threaded rod. The inner surfaces of the upper and lower connecting blocks are fixedly connected to the outer surfaces of the upper and lower molds, respectively.

[0009] The above solution involves locking the fastening components with threaded rods and double nuts, enhancing mold sealing, resisting injection pressure, preventing molten material leakage, and reducing scrap rate.

[0010] Preferably, the lower end of the upper fastening nut and the upper end of the lower fastening nut are tightly fitted with the upper end of the upper connecting block and the lower end of the lower connecting block, respectively.

[0011] The above solution allows for tight fit between the two nuts and the upper and lower connecting blocks, achieving bidirectional locking, preventing loosening after mold closing, and further improving the reliability of the fastening.

[0012] Preferably, the lifting device includes a connecting frame, with T-shaped grooves on both the front and rear inner walls of the connecting frame. An installation frame is fixedly connected to the upper left and lower left ends of the connecting frame. Several rack blocks are fixedly connected to the inner wall of the installation frame. T-shaped sliding plates are slidably connected to both T-shaped sliding grooves. A lifting block is fixedly connected to the inner sides of both T-shaped sliding plates. Two side plates are fixedly connected to the left end of the lifting block. A rotary motor is fixedly connected to the front end of the front side plate. A gear is fixedly connected to the output end of the rotary motor through the front side plate. The lower end of the connecting frame is fixedly connected to the upper end of the base plate.

[0013] The above solution enables the lifting device to smoothly lift and lower the upper mold through a gear rack and T-shaped slide, ensuring accurate mold closing and alignment, replacing manual operation and improving efficiency.

[0014] Preferably, the left end of the mounting plate and the right end of the lifting block are fixedly connected.

[0015] The above solution involves fixing the mounting plate to the lifting block, ensuring that the upper mold moves synchronously with the lifting device, avoiding shaking, and improving the stability and accuracy of mold closing.

[0016] Preferably, the two T-shaped slide plates and the two side plates are distributed in a front-to-back mirror image configuration.

[0017] The above solution involves a T-shaped sliding plate and side plates that are mirrored front and rear, ensuring balanced lifting force, preventing the upper mold from tilting, and guaranteeing the verticality of the mold closing.

[0018] Preferably, the rear end of the gear is movably connected to the front end of the rear side plate via a bearing, and the gear and the rack block are meshed together.

[0019] The above solution, with gears meshing with racks and supported by rear bearings, ensures smooth and precise lifting transmission, improves mold closing position accuracy, and reduces mechanical wear.

[0020] Compared with the prior art, the present invention has the following beneficial effects: 1. In this utility model, the T-shaped slide groove and T-shaped sliding plate of the lifting device provide a stable linear guide for the lifting of the upper mold, avoiding the offset problem that is easy to occur in traditional manual or simple guide structures. At the same time, the upper mold and the lower mold are fixedly connected to the lifting block through the mounting plate, ensuring that the upper and lower molds always remain coaxially aligned during the lifting process, effectively eliminating the mold closing alignment deviation. This design can significantly reduce the problems of product flash and dimensional deviation caused by misalignment, while avoiding the collision damage of the mold cavity caused by deviation, extending the service life of the mold, and reducing the scrap rate and mold maintenance cost.

[0021] 2. In this utility model, the fastening component adopts a double locking structure of "upper connecting block, lower connecting block, threaded rod, and double fastening nuts". Compared with the traditional simple fastening design, it can tightly fit the upper mold and the lower mold through the bidirectional locking effect of the double nuts. After the mold is closed, this structure can effectively resist the pressure of the molten material during the injection molding process, avoid gaps on the mold parting surface, and prevent molten material leakage from the source. This design not only reduces the scrap rate caused by material leakage, but also reduces molten material waste. At the same time, it avoids the pollution of the mold surface caused by material leakage, reduces the frequency of mold cleaning, and improves production efficiency. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of a mobile phone case injection mold that facilitates mold closing according to this utility model; Figure 2 This is a schematic diagram showing the connection and disassembly of a lifting device for a mobile phone case injection mold that facilitates mold closing, according to the present invention. Figure 3 This is a schematic diagram showing the connection and disassembly of the mold assembly for a mobile phone case injection mold that facilitates mold closing, according to this utility model. Figure 4 This is a schematic diagram showing the connection and disassembly of the fastening components of a mobile phone case injection mold that facilitates mold closing, according to this utility model.

[0023] In the diagram: 1. Base plate; 2. Support rod; 3. Foot; 4. Lifting device; 5. Mold assembly; 41. Connecting frame; 42. T-shaped slide; 43. Mounting frame; 44. Rack block; 45. T-shaped slide plate; 46. Lifting block; 47. Side plate; 48. Rotary motor; 49. Gear; 51. Mounting plate; 52. Screw; 53. Upper mold; 54. Injection tube; 55. Lower mold; 56. Mobile phone case cavity; 57. Fastening assembly; 571. Upper connecting block; 572. Lower connecting block; 573. Through hole; 574. Threaded rod; 575. Fastening nut. Detailed Implementation

[0024] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0025] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] Please see Figure 1-4 This utility model provides a technical solution: A mobile phone case injection mold that facilitates mold closing includes a base plate 1. Support rods 2 are fixedly connected to the four corners of the lower end of the base plate 1. Foot bases 3 are fixedly connected to the lower ends of the four support rods 2. A lifting device 4 is fixedly connected to the upper left part of the base plate 1. A mold device 5 is snapped into the right end of the lifting device 4.

[0028] In this embodiment, the mold device 5 includes a mounting plate 51 and a lower mold 55. Two screws 52 are inserted and connected to the front and rear of the left end of the mounting plate 51. The four screws 52 are threaded together to connect to an upper mold 53. An injection molding tube 54 is inserted and fixedly connected to the upper end of the upper mold 53. A mobile phone shell cavity 56 is formed inside the lower mold 55. Fastening components 57 are fixedly connected to the three outer surfaces of the upper mold 53 and the lower mold 55. The lower end of the lower mold 55 is fixedly connected to the upper end of the base plate 1. The upper mold 53 and the lower mold 55 are identical in shape and size. The fastening component 57 includes an upper connecting block 571 and a lower connecting block 572. Both the upper connecting block 571 and the lower connecting block 572 have through holes 573 that pass through vertically. A threaded rod 574 is inserted into both holes 573. A fastening nut 575 is threaded onto the upper and lower outer surfaces of the threaded rod 574. The inner surfaces of the upper connecting block 571 and the lower connecting block 572 are fixedly connected to the outer surfaces of the upper mold 53 and the lower mold 55, respectively. The lower end of the upper fastening nut 575 and the upper end of the lower fastening nut 575 are tightly fitted to the upper end of the upper connecting block 571 and the lower end of the lower connecting block 572, respectively. The left end of the mounting plate 51 and the right end of the lifting block 46 are fixedly connected.

[0029] Through the above scheme: after the equipment is started, the rotary motor 48 of the lifting device 4 drives the gear 49 to rotate. The gear 49 meshes with the rack block 44 of the mounting frame 43, causing the lifting block 46 to move along the T-shaped slide plate 45 along the T-shaped slide plate 45 of the connecting frame 41. As the sliding groove 42 descends, the mounting plate 51 is fixed to the right end of the lifting block 46, and the mounting plate 51 descends synchronously with the lifting block 46. The upper mold 53, which is connected to the mounting plate 51 by screws 52, also descends. The upper mold 53 and the lower mold 55 are the same size and shape. After precise fitting, the threaded rod 574 is inserted into the insertion holes 573 of the upper connecting block 571 and the lower connecting block 572. The upper and lower fastening nuts 575 are tightened so that they fit tightly with the upper end of the upper connecting block 571 and the lower end of the lower connecting block 572, respectively, to complete the mold closing and fixing. Then, the molten plastic is injected through the injection tube 54 of the upper mold 53 and flows into the mobile phone shell cavity 56 of the lower mold 55. After molding, the fastening nuts 575 are loosened, and the lifting device 4 drives the upper mold 53 to rise and open the mold, so that the finished product can be taken out. The lower end of the lower mold 55 is fixed to the upper end of the base plate 1 to ensure overall stability.

[0030] In this embodiment, the lifting device 4 includes a connecting frame 41. T-shaped grooves 42 are provided on the front and rear inner walls of the connecting frame 41. An installation frame 43 is fixedly connected to the upper left end and the lower left end of the connecting frame 41. Several rack blocks 44 are fixedly connected to the inner wall of the installation frame 43. T-shaped slide plates 45 are slidably connected to the two T-shaped grooves 42. Lifting blocks 46 are fixedly connected to the inner sides of the two T-shaped slide plates 45. Two side plates 47 are fixedly connected to the left end of the lifting block 46. A rotary motor 48 is fixedly connected to the front end of the front side plate 47. A gear 49 is fixedly connected to the output end of the rotary motor 48 through the front side plate 47. The lower end of the connecting frame 41 is fixedly connected to the upper end of the base plate 1. The two T-shaped slide plates 45 and the two side plates 47 are distributed in a front-to-back mirror image. The rear end of the gear 49 is movably connected to the front end of the rear side plate 47 through a bearing. The gear 49 and the rack blocks 44 are meshed together.

[0031] Through the above scheme: When the lifting device 4 is working, the rotary motor 48 at the front end of the front side plate 47 is started first. Its output end drives the gear 49 to rotate. Since the rear end of the gear 49 is movably connected to the front end of the rear side plate 47 through the bearing and meshes with the rack block 44 on the inner wall of the mounting frame 43, the gear 49 moves up and down along the rack block 44 when it rotates, driving the two side plates 47 connected to it and the lifting block 46 at the right end of the side plate 47 to move synchronously. The two T-shaped sliding plates 45 fixed on the inner side of the lifting block 46 are slidably connected to the T-shaped sliding grooves 42 on the front and rear inner walls of the connecting frame 41, and the T-shaped sliding plates 45 and the side plates 47 are mirror images of each other to ensure that the lifting block 46 moves smoothly and does not tilt. The lower end of the connecting frame 41 is fixed to the upper end of the base plate 1 to provide stable support for the entire lifting device 4. Finally, the lifting block 46 drives the mold device 5 to lift and lower precisely to meet the requirements of mold closing and mold opening.

[0032] It should be noted that this utility model is a mobile phone case injection mold that facilitates mold closing. During use, firstly, confirm that the support rod 2 and foot 3 at the lower end of the base plate 1 stably support the equipment. The lower end of the lower mold 55 is fixed to the upper end of the base plate 1, and the lower end of the connecting frame 41 of the lifting device 4 is also fixed to the base plate 1 to ensure overall stability. Check that the gear 49 and the rack block 44 are meshing normally, and that the T-shaped slide plate 45 can slide smoothly along the T-shaped slide groove 42. Start the rotary motor 48 of the lifting device 4, and its output end drives the gear 49 to rotate. Because the gear 49 meshes with the rack block 44 on the inner wall of the mounting frame 43, it drives the lifting block 46 and the two side plates 47 to move down. The lifting block 46 moves along the T-shaped slide plate 45. The guide slide 42 guides the sliding to avoid deviation; the mounting plate 51, which is fixed to the right end of the lifting block 46, moves down synchronously, and the upper mold 53, which is connected to the mounting plate 51 by screws 52, also descends. After the upper mold 53 and the lower mold 55 are precisely fitted, the threaded rod 574 is inserted into the through hole 573 of the upper connecting block 571 and the lower connecting block 572, and the upper and lower fastening nuts 575 are tightened so that they are tightly fitted to the upper end of the upper connecting block 571 and the lower end of the lower connecting block 572, respectively, to complete the mold closing and sealing. Molten plastic is injected through the injection tube 54 at the upper end of the upper mold 53 and enters the mobile phone shell cavity 56 of the lower mold 55 along the flow channel. The preset injection pressure is maintained until the plastic solidifies and is formed. After forming, the fastening nuts 575 are loosened, and the rotating motor 48 is started in reverse. The gear 49 moves up along the rack block 44, driving the lifting block 46, the mounting plate 51 and the upper mold 53 to rise and open the mold. Finally, the finished product in the mobile phone shell cavity 56 is removed manually or mechanically, and the equipment is reset to enter the next cycle.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A mobile phone case injection mold that facilitates mold closing, comprising a base plate (1), characterized in that: Support rods (2) are fixedly connected to the four corners of the lower end of the base plate (1), and foot seats (3) are fixedly connected to the lower ends of the four support rods (2). A lifting device (4) is fixedly connected to the upper left side of the base plate (1), and a mold device (5) is snapped into the right end of the lifting device (4). The mold device (5) includes a mounting plate (51) and a lower mold (55). Two screws (52) are inserted and connected to the front and rear of the left end of the mounting plate (51). The four screws (52) are threaded together to connect to the upper mold (53). An injection tube (54) is inserted and fixedly connected to the upper end of the upper mold (53). A mobile phone shell cavity (56) is opened in the lower mold (55). Fastening components (57) are fixedly connected to the three outer sides of the upper mold (53) and the lower mold (55). The lower end of the lower mold (55) is fixedly connected to the upper end of the base plate (1).

2. The mobile phone case injection mold for easy mold closing according to claim 1, characterized in that: The upper mold (53) and the lower mold (55) are identical in shape and size.

3. The mobile phone case injection mold for easy mold closing according to claim 1, characterized in that: The fastening assembly (57) includes an upper connecting block (571) and a lower connecting block (572). Both the upper connecting block (571) and the lower connecting block (572) have through holes (573) that pass through vertically. A threaded rod (574) is inserted into both of the through holes (573). A fastening nut (575) is threaded onto the upper part of the outer surface and the lower part of the outer surface of the threaded rod (574). The inner surfaces of the upper connecting block (571) and the lower connecting block (572) are fixedly connected to the outer surfaces of the upper mold (53) and the lower mold (55), respectively.

4. The mobile phone case injection mold for easy mold closing according to claim 3, characterized in that: The lower end of the upper fastening nut (575) and the upper end of the lower fastening nut (575) are tightly fitted with the upper end of the upper connecting block (571) and the lower end of the lower connecting block (572), respectively.

5. A mobile phone case injection mold for easy mold closing according to claim 1, characterized in that: The lifting device (4) includes a connecting frame (41). T-shaped grooves (42) are provided on the front and rear inner walls of the connecting frame (41). An installation frame (43) is fixedly connected to the upper left end and the lower left end of the connecting frame (41). Several rack blocks (44) are fixedly connected to the inner wall of the installation frame (43). T-shaped slide plates (45) are slidably connected to the two T-shaped grooves (42). Lifting blocks (46) are fixedly connected to the inner sides of the two T-shaped slide plates (45). Two side plates (47) are fixedly connected to the left end of the lifting block (46). A rotary motor (48) is fixedly connected to the front end of the front side plate (47). A gear (49) is fixedly connected to the output end of the rotary motor (48) through the front side plate (47). The lower end of the connecting frame (41) is fixedly connected to the upper end of the base plate (1).

6. The mobile phone case injection mold for easy mold closing according to claim 1, characterized in that: The left end of the mounting plate (51) and the right end of the lifting block (46) are fixedly connected.

7. A mobile phone case injection mold for easy mold closing according to claim 5, characterized in that: The two T-shaped skateboards (45) and the two side plates (47) are all mirror images of each other.

8. A mobile phone case injection mold for easy mold closing according to claim 5, characterized in that: The rear end of the gear (49) is movably connected to the front end of the rear side plate (47) via a bearing, and the gear (49) and the rack block (44) are meshed together.

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