Die with sliding block in movable die
By introducing sliders and reversing sliders mechanisms in the movable mold into the injection mold, the problem that existing molds are difficult to form complex structures in one go is solved, and the effect of one-time forming and process saving of complex structures is achieved.
Patent Information
- Application Number
- CN202421674511.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-16
- Publication Date
- 2025-05-06
- Estimated Expiration
- 2034-07-16
AI Technical Summary
Existing injection molds are difficult to mold plastic products with complex structures at one time, especially products with inverted structures. Multiple sets of oblique top structures require large space, resulting in an increase in the specific mold volume and the inability to set up other structures, which requires secondary processing.
A mold with a slider in a moving mold is designed, and the slider is depressed and snapped by means of a retractable slider mechanism is used to drive the slider movement through the inner and outer locking blocks, so as to realize the slider is in place when the mold is closed and the slider is depressed when the mold is opened, and the mold cavity is formed with the moving mold core and the fixed mold core.
The preparation of products with complex structures is realized in one molding, avoiding secondary processing steps, saving processes, reducing costs, and simplifying mold design and production.
Smart Images
Figure CN222832309U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of injection molding, in particular to a mold with a sliding block in a movable mold. Background Art
[0002] Injection molding is a low-cost mass production process for plastic products. Injection molds are required during the injection molding process. After the molds are closed, the molding machine injects molten material into the mold cavity. After the material cools, it forms a product that matches the shape of the cavity.
[0003] Since the injection molding process has the advantages of low cost and mass production, many plastic products are made by injection molding. At the same time, for the consideration of cost and saving production process, for relatively complex workpieces, it is also hoped that they can be molded in one time, and try to avoid secondary processing after one-time molding.
[0004] There is a type of workpiece, which is generally cylindrical with a bottom at one end, with an undercut structure on the inner wall of the cylinder, and a larger center hole is opened in the center of its bottom surface, and there are also multiple relatively small holes. Since the structure of this workpiece is extremely complex, and the core pulling direction of the undercut structure is opposite to that of the traditional side core pulling mechanism, if a traditional mold is used for injection molding of such workpieces, it is necessary to set up multiple sets of inclined top structures in the mold. These inclined top structures need to occupy a relatively large space, resulting in an increase in the overall volume of the mold, and also causing the inclined top structures to occupy the normal space of other structures. Therefore, many other structures (such as the large center hole on the bottom surface and the placeholder core of the small hole) cannot be set, and the workpiece has to be prepared through secondary processing operations after molding.
[0005] Therefore, a method or device capable of solving the above problems is now needed. Summary of the invention
[0006] The utility model aims to solve the above-mentioned deficiencies in the prior art and proposes a mold with a movable inner slide which has a simple structure, ingenious design, and reasonable layout, and can realize the undercutting action for products with undercut structures located on the inner side and can realize a one-time molding operation.
[0007] The technical solution of the utility model is: a mold with a slider in a movable mold, including a fixed mold part and a movable mold part, the fixed mold part includes a fixed mold take-up plate 1, and a hot runner plate 2, a stripper plate 3 and a fixed mold plate 4 are sequentially arranged below the fixed mold take-up plate 1, the movable mold part includes a movable mold take-up plate 5, and a push rod bottom plate 6, a push rod plate 7, a square iron 8, a movable mold bottom plate 9 and a movable mold plate 10 are sequentially arranged above the movable mold take-up plate 5, a fixed mold core 11 is arranged in the fixed mold plate 4, and a movable mold core 12 is arranged in the movable mold plate 10. In the mold closing state, the fixed mold core 11 and the movable mold core 12 are enclosed together to form a cavity, characterized in that:
[0008] The movable mold core 12 is slidably connected with n undercut sliders 13, and the undercut sliders 13 are provided with an undercut molding portion 14 located on the inner side of the cavity. The outer end of the undercut slider 13 is provided with an outer driving inclined surface, and the inner end is provided with an inner driving inclined surface. N outer locking blocks 15 corresponding to the undercut sliders 13 are provided in the movable mold plate 10, and the outer locking blocks 15 are provided with an outer locking inclined surface matching the outer driving inclined surface, and the bottom end of the outer locking block 15 is fixedly connected to the movable mold bottom plate 9, and n inner locking blocks 16 corresponding to the undercut sliders 13 are also provided on the movable mold bottom plate 9, and the inner locking blocks 16 are provided with an inner locking inclined surface matching the inner driving inclined surface.
[0009] The movable mold taking plate 5 is provided with a movable mold core 17, which is movably connected to the ejector bottom plate 6, the ejector plate 7, the movable mold bottom plate 9 and the movable mold plate 10, and its top end is located in the movable mold core 12. At the same time, a fixed mold core 18 opposite to the movable mold core 17 is also provided in the fixed mold core 11. A push tube 19 is movably sleeved outside the movable mold core 17, and the bottom end of the push tube 19 is fixedly connected to the ejector bottom plate 6, and the top end of the push tube 19 is located below the cavity.
[0010] A first limiting screw 20 and a second limiting screw 21 are provided between the movable mold plate 10 and the movable mold bottom plate 9 , and a return rod 22 is provided between the movable mold plate 10 and the ejector plate 7 .
[0011] Compared with the prior art, the utility model has the following advantages:
[0012] The mold with a slider in the movable mold of this structural form has a simple structure, ingenious design and reasonable layout. It is designed to solve the problems encountered by traditional molds when producing products with special structures. It realizes the demoulding operation of the undercut structure on the inner wall of the product through a set of undercut slider mechanism. The undercut slider mechanism consists of a slider and an inner locking block and an outer locking block located at both ends. The inner and outer locking blocks drive the undercut slider to move in two directions respectively, so as to realize the movement of the slider in place when the mold is closed and the undercut action of the slider when the mold is opened. At the same time, it also sets a pair of matching movable mold core and fixed mold core. In the closed mold state, the two core shafts contact each other and occupy the position in the cavity to form a center hole on the bottom surface of the product. It can complete the preparation of products with relatively complex structures in one molding action, and the final product can be obtained without adding subsequent processing steps, which can effectively save processes and reduce costs. In addition, its manufacturing process 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, and its market prospects are very broad. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model.
[0014] Figure 2 yes Figure 1 Enlarged view of part A in .
[0015] Figure 3 yes Figure 2 Enlarged view of part B in . DETAILED DESCRIPTION
[0016] The specific implementation of the present utility model will be described below in conjunction with the accompanying drawings. Figures 1 to 3 As shown: a mold with a slider in a movable mold, including a fixed mold part and a movable mold part, the fixed mold part includes a fixed mold taking plate 1, below which a hot runner plate 2, a stripper plate 3 and a fixed mold plate 4 are sequentially arranged, the movable mold part includes a movable mold taking plate 5, above which a push rod bottom plate 6, a push rod plate 7, a square iron 8, a movable mold bottom plate 9 and a movable mold plate 10 are sequentially arranged, a fixed mold core 11 is arranged in the fixed mold plate 4, and a movable mold core 12 is arranged in the movable mold plate 10. In the mold closing state, the fixed mold core 11 and the movable mold core 12 are enclosed together to form a cavity.
[0017] The movable mold core 12 is slidably connected with n undercut sliders 13, and the undercut sliders 13 are provided with an undercut molding portion 14 located on the inner side of the cavity. The outer end of the undercut slider 13 is provided with an outer driving inclined surface, and the inner end is provided with an inner driving inclined surface. N outer locking blocks 15 corresponding to the undercut sliders 13 are provided in the movable mold plate 10, and the outer locking blocks 15 are provided with an outer locking inclined surface matching the outer driving inclined surface, and the bottom end of the outer locking block 15 is fixedly connected to the movable mold bottom plate 9, and n inner locking blocks 16 corresponding to the undercut sliders 13 are also provided on the movable mold bottom plate 9, and the inner locking blocks 16 are provided with an inner locking inclined surface matching the inner driving inclined surface.
[0018] The movable mold taking plate 5 is provided with a movable mold core 17, which is movably connected to the ejector bottom plate 6, the ejector plate 7, the movable mold bottom plate 9 and the movable mold plate 10, and its top end is located in the movable mold core 12. At the same time, a fixed mold core 18 opposite to the movable mold core 17 is also provided in the fixed mold core 11. A push tube 19 is movably sleeved outside the movable mold core 17, and the bottom end of the push tube 19 is fixedly connected to the ejector bottom plate 6, and the top end of the push tube 19 is located below the cavity.
[0019] A first limiting screw 20 and a second limiting screw 21 are provided between the movable mold plate 10 and the movable mold bottom plate 9 , and a return rod 22 is provided between the movable mold plate 10 and the ejector plate 7 .
[0020] The working process of the mold with the movable mold inner slider of the embodiment of the utility model is as follows: in the mold closing state, the movable mold core 12 and the movable mold core 11 are together surrounded to form a cavity, at this time, the top end surface of the movable mold core 17 and the bottom end surface of the fixed mold core 18 are in contact with each other, and the two occupy a position in the cavity together to form a center hole on the bottom surface of the product 23, and the undercut molding part 14 on the undercut slider 13 will also occupy a position in the cavity to form an undercut part on the inner wall of the product 23;
[0021] The molding machine injects the molten material into the mold cavity, and the material is cooled to form a product 23. A central hole is formed at a position matching the fixed mold core 18 on the product 23, a plurality of small holes are formed at a position matching the plurality of pins on the fixed mold core 9, and an undercut portion is formed at a position matching the undercut molding portion 14;
[0022] When opening the mold, the stripper plate 3 and the fixed mold plate 4 are opened first, and the material channel and the product 23 are separated;
[0023] Then the hot runner plate 2 is separated from the stripper plate 3, the material handle falls off from the stripper plate 3, and the manipulator takes the material handle away;
[0024] The mold is opened continuously, and the fixed mold plate 4 and the movable mold plate 10 are separated. At this time, the product 23 is exposed to the air, and at the same time, the fixed mold core 18 is pulled out from the central hole on the bottom surface of the product 23, and the pins on the fixed mold core 9 are also pulled out from the multiple small holes on the bottom surface of the product 23;
[0025] The mold opening action continues, and the movable mold plate 10 is separated from the movable mold bottom plate 9. During this process, the inner locking block 16 moves downward relative to the product 22, and the inner locking slope on its top is out of contact with the inner driving slope on the stripping slider 13. At the same time, the outer locking block 15 also moves downward relative to the product 22, and the outer locking slope arranged on it squeezes the outer driving slope. Under the action of the two, the stripping slider 13 moves toward the central axis of the product 22, and the undercut forming part 14 thereon moves inward, realizing the stripping action to the inside; after stripping, there is no obstacle for the product 22 in the demoulding direction;
[0026] Then the ejector bottom plate 6 and the ejector plate 7 drive the push tube 19 to move toward the product 22 relative to the movable mold core 17, and the product 22 is ejected from the movable mold core 12, so that the product 22 completes the demoulding action.
[0027] The mold can be used to prepare a special product 22 having an inner wall with an undercut structure and a larger central hole and multiple smaller through holes on the bottom end surface in one injection molding.
Claims
1. A mold with a slider in a movable mold, comprising a fixed mold part and a movable mold part, the fixed mold part comprising a fixed mold take-up plate (1), below which a hot runner plate (2), a stripper plate (3) and a fixed mold plate (4) are arranged in sequence, the movable mold part comprising a movable mold take-up plate (5), above which a push rod bottom plate (6), a push rod plate (7), a square iron (8), a movable mold bottom plate (9) and a movable mold plate (10) are arranged in sequence, the fixed mold plate (4) having a fixed mold core (11), the movable mold plate (10) having a movable mold core (12), in a mold closing state, the fixed mold core (11) and the movable mold core (12) together enclose a mold cavity, characterized in that: The movable mold core (12) is slidably connected with n undercut sliders (13), the undercut sliders (13) are provided with an undercut molding portion (14) located on the inner side of the mold cavity, the outer end of the undercut sliders (13) are provided with an outer driving inclined surface, and the inner end is provided with an inner driving inclined surface, n outer locking blocks (15) corresponding to the undercut sliders (13) are provided in the movable mold plate (10), the outer locking blocks (15) are provided with an outer locking inclined surface matching the outer driving inclined surface, and the bottom end of the outer locking block (15) is fixedly connected to the movable mold bottom plate (9), and n inner locking blocks (16) corresponding to the undercut sliders (13) are also provided on the movable mold bottom plate (9), and the inner locking blocks (16) are provided with an inner locking inclined surface matching the inner driving inclined surface. The movable mold taking plate (5) is provided with a movable mold core (17), the movable mold core (17) is movably connected to the ejector bottom plate (6), the ejector plate (7), the movable mold bottom plate (9) and the movable mold plate (10), and its top end is located in the movable mold core (12). At the same time, a fixed mold core (18) is also provided in the fixed mold core (11) and is opposite to the movable mold core (17). A push tube (19) is movably sleeved outside the movable mold core (17), and the bottom end of the push tube (19) is fixedly connected to the ejector bottom plate (6), and the top end of the push tube (19) is located below the mold cavity. A first limiting screw (20) and a second limiting screw (21) are provided between the movable die plate (10) and the movable die bottom plate (9), and a return rod (22) is provided between the movable die plate (10) and the ejector plate (7).