Injection mold and injection mold three-layer sliding block reverse buckle removing mechanism
By designing a three-layer slider retracting mechanism in the injection mold, the problem of difficult retracting structures in different directions during the injection molding process is solved, and an efficient mold retracting process is achieved, and product quality and production efficiency are improved.
Patent Information
- Application Number
- CN202421702778.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-18
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-07-18
AI Technical Summary
During the injection molding process, it is difficult to effectively release the inverted structures in different directions inside the plastic product through the traditional oblique top release mechanism, resulting in incomplete release and affecting product quality and production efficiency.
A three-layer slider lifting mechanism is designed, including a large slider, a small uphill slider, a small downhill slider and an inclined guide column. The inclined guide column is driven upward through the cavity, and the large slider slider is pushed outward to slide relative to the core. It is used to slide outward with the small uphill slider and a small downhill slider to achieve a lifting button at different angles.
The deflection function at different angles is realized to ensure the smooth release of injection molded products, improve product quality, reduce waste rate, improve production efficiency, and simplify the structure of injection molds and reduce manufacturing costs.
Smart Images
Figure CN222858643U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of injection molds, in particular to an injection mold and a three-layer slider disengaging and buckling mechanism of the injection mold. Background Art
[0002] Injection molding is a method for producing industrial products. Products are usually made of rubber and plastic injection molding. The advantages of the injection molding method are fast production speed, high efficiency, automated operation, a wide variety of patterns and colors, shapes from simple to complex, sizes from large to small, and precise product size. The product is easy to update and can be made into complex-shaped parts. Injection molding is suitable for mass production and complex-shaped products and other molding processing fields.
[0003] In the injection molding of plastic products, undercuts are usually set inside the structure of the plastic product, which makes it impossible to remove the plastic product from the mold core through the conventional ejection mechanism after molding, and a special design is needed to solve this problem. The traditional method is to use a top plate or a cylinder to push the ejection mechanism to push the plastic product to demold, and the middle inclined top pushes the internal undercuts on the plastic product to force it to demold outward. However, when some plastic product structures are set with undercuts in different directions, ordinary inclined tops cannot meet the normal demolding requirements, which requires the addition of other undercut removal structures. Utility Model Content
[0004] In order to overcome the above-mentioned problems existing in the prior art, the present application provides an injection mold equipped with a three-layer slider disengaging mechanism; the three-layer slider disengaging mechanism is arranged between the cavity and the core, and includes a large slider, an uphill small slider, a downhill small slider and an inclined guide column that cooperate with each other; when the injection mold is opened, the cavity drives the inclined guide column to move upward, pushing the large slider to slide outward relative to the core, and at the same time, the uphill small slider and the downhill small slider slide outward together under the pull of the large slider, so that the function of disengaging at different angles can be realized, ensuring smooth demolding of the injection molded product, improving product quality, reducing scrap rate, and high production efficiency; in addition, the three-layer slider disengaging mechanism has few related parts and is easy to assemble, so that the overall structure of the injection mold is simplified and the manufacturing cost is low. Correspondingly, the present application also provides a three-layer slider disengaging mechanism for an injection mold.
[0005] For the injection mold, the technical solution of this application is:
[0006] The injection mold comprises an upper composite plate and a lower composite plate, and a hot runner plate, a cavity, a core and a mold foot arranged between the upper composite plate and the lower composite plate; a three-layer slider disengaging and buckling mechanism is arranged between the cavity and the core; the three-layer slider disengaging and buckling mechanism comprises a large slider, an uphill small slider, a downhill small slider and an inclined guide column; the large slider is slidably connected to the core; the uphill small slider and the downhill small slider are distributed up and down and are located on the inner side of the large slider, and the inner side surfaces of the uphill small slider and the downhill small slider are respectively against the outer side surface of the insert to form a limit; the insert is fixed on the large slider; one end of the inclined guide column is fixed on the cavity, and the other end is inserted into the through hole on the large slider to form a sliding pair.
[0007] Compared with the prior art, the injection mold of the present application is provided with a three-layer slider disengaging mechanism between the cavity and the core, including a large slider, an uphill small slider, a downhill small slider and an inclined guide column that cooperate with each other; when the injection mold is opened, the inclined guide column is driven upward by the cavity to push the large slider to slide outward relative to the core, and at the same time, the uphill small slider and the downhill small slider slide outward together under the pull of the large slider, thereby realizing the function of disengaging the backlash at different angles, ensuring smooth demolding of the injection molded product, improving product quality, reducing the scrap rate, and having high production efficiency; in addition, the three-layer slider disengaging mechanism has fewer associated components and is easy to assemble, so that the overall structure of the injection mold is simplified and the manufacturing cost is low.
[0008] As an optimization, in the aforementioned injection mold, a spring is provided inside the large slider; the spring is sleeved on the guide post, and the guide post is slidably connected to the large slider; one end of the spring is fixed to the limit boss inside the large slider, and the other end is fixed to the limit head at the end of the guide post; when the injection mold is closed, the spring is in a compressed state. Therefore, when the mold is opened, the elastic force of the spring can assist the inclined guide post in pushing the large slider to slide outward, and after the large slider slides out, it can also prevent the large slider from resetting prematurely and hitting the cavity.
[0009] As an optimization, in the aforementioned injection mold, a travel limit block is provided on the core to limit the sliding travel of the large slider; when the large slider slides to contact the surface of the travel limit block, the mold opening action is completed. At this time, it is convenient for better demoulding; it can also prevent the large slider from sliding outward too much to affect the mold reset.
[0010] As an optimization, in the aforementioned injection mold, wear-resistant plates are provided between the large slider and the core, between the downhill small slider and the core, between the large slider and the uphill small slider, and between the large slider and the downhill small slider. The provision of the wear-resistant plates can reduce the friction force when each part slides, reduce friction loss, and extend their service life. Moreover, maintenance only requires replacement of the wear-resistant plates, which is simple to operate.
[0011] As an optimization, in the aforementioned injection mold, a strip slide groove is provided at the bottom of the large slider, and correspondingly, a strip slider that slides with the strip slide groove is provided on the core. The cooperation between the strip slider and the strip slide groove can prevent the large slider from being displaced when it moves. Furthermore, two inclined guide pillars are provided in the three-layer slider disengaging and buckling mechanism, and the two inclined guide pillars are distributed on both sides of the strip slide groove. In this way, it can be ensured that the large slider is evenly stressed, further preventing it from being displaced.
[0012] As an optimization, in the aforementioned injection mold, the core is fixed with a first pressing plate, a second pressing plate and a third pressing plate, and correspondingly, the large slider, the small uphill slider and the small downhill slider are respectively provided with a first limiting step, a second limiting step and a third limiting step that cooperate with the first pressing plate, the second pressing plate and the third pressing plate to form a limiting position. Thus, it can be ensured that the large slider and the small uphill and downhill sliders can only move in one direction, thereby preventing the small uphill and downhill sliders from falling when they are pulled by the large slider.
[0013] As an optimization, in the aforementioned injection mold, two three-layer slider undercut removal mechanisms are provided between the cavity and the core, so that it can be applied to injection molded products with many undercuts inside.
[0014] For the buckle-off mechanism, the technical solution of this application is:
[0015] The three-layer slider disengaging and buckling mechanism of the injection mold comprises a large slider, an uphill small slider, a downhill small slider and an inclined guide column; the large slider is slidably connected to the core; the uphill small slider and the downhill small slider are distributed up and down and are located on the inner side of the large slider, and the inner side surfaces of the uphill small slider and the downhill small slider are against the outer side surfaces of the insert to form a limit; the insert is fixed on the large slider; one end of the inclined guide column is fixed on the cavity, and the other end is inserted into the through hole on the large slider to form a sliding pair; a spring is provided inside the large slider; the spring is sleeved on the guide column, and the guide column is slidably connected to the large slider; one end of the spring is fixed to the limit boss inside the large slider, and the other end is fixed to the limit head at the end of the guide column; when the injection mold is closed, the spring is in a compressed state.
[0016] Compared with the prior art, the three-layer slider unfastening mechanism of the injection mold of the present application includes a large slider, an uphill small slider, a downhill small slider and an inclined guide column that cooperate with each other; wherein, the large slider is slidably connected to the core, the uphill lower slider and the downhill small slider are limited to the inner side of the large slider by the insert, and can move synchronously with the large slider, and one end of the inclined guide column is fixed on the cavity, and the other end is slidably connected to the large slider; when the injection mold is opened, the cavity drives the inclined guide column to move upward, pushing the large slider to slide outward relative to the core, and at the same time the uphill small slider and the downhill small slider slide outward together under the pull of the large slider, thereby realizing the function of unfastening at different angles, ensuring smooth demolding of the injection molded product, improving product quality, reducing scrap rate, and high production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a structural schematic diagram of the injection mold of the present application;
[0018] Figure 2 yes Figure 1 AA section view in the figure;
[0019] Figure 3 yes Figure 2 An enlarged schematic diagram of part B in FIG.
[0020] Figure 4 It is a structural schematic diagram of the three-layer slider disengaging and buckling mechanism in the present application;
[0021] Figure 5 yes Figure 4 A schematic diagram of the back structure of the three-layer slider disengaging undercut mechanism;
[0022] Figure 6 It is a schematic diagram of the spring in the present application being assembled in the large slider.
[0023] The markings in the accompanying drawings are: 1-upper plate; 2-lower plate; 3-hot runner plate; 4-cavity; 5-mold foot; 6-mold foot; 7-large slider, 71-first limit step; 8-uphill small slider, 81-second limit step; 9-downhill small slider, 91-third limit step; 10-inclined guide column; 11-insert; 12-spring; 13-guide column, 131-limit head; 14-travel limit block; 15-wear-resistant plate; 16-strip slider; 17-first pressure plate; 18-second pressure plate; 19-third pressure plate. DETAILED DESCRIPTION
[0024] The present application is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present application.
[0025] Example (see Figure 1 to Figure 6 ):
[0026] The injection mold in this embodiment includes an upper composite plate 1 and a lower composite plate 2, and a hot runner plate 3, a cavity 4, a core 5 and a mold foot 6 arranged between the upper composite plate 1 and the lower composite plate 2; a three-layer slider disengaging mechanism is provided between the cavity 4 and the core 5; the three-layer slider disengaging mechanism includes a large slider 7, an uphill small slider 8, a downhill small slider 9 and an inclined guide column 10; the large slider 7 is slidably connected to the core 5; the uphill small slider 8 and the downhill small slider 9 are distributed up and down and are located on the inner side of the large slider 7, and the inner side surfaces of the uphill small slider 8 and the downhill small slider 9 are against the outer side surface of the insert 11 to form a limit; the insert 11 is fixed on the large slider 7 (fixed by bolts); one end of the inclined guide column 10 is fixed on the cavity 4, and the other end is inserted into the through hole on the large slider 7 to form a sliding pair.
[0027] In this embodiment, a spring 12 is provided inside the large slider 7; the spring 12 is sleeved on a guide post 13, and the guide post 13 is slidably connected to the large slider 7; one end of the spring 12 is fixed to a limiting step inside the large slider 7, and the other end is fixed to a limiting head 131 at the end of the guide post 13; when the injection mold is closed, the spring 12 is in a compressed state. Therefore, when the mold is opened, the elastic force of the spring 12 can assist the inclined guide post 10 in pushing the large slider 7 to slide outward, and after the large slider 7 slides out, the spring 12 pulls the large slider 7 (the spring 12 is in a pre-stressed state), which can also prevent the large slider 7 from resetting prematurely and hitting the cavity 4.
[0028] In this embodiment, a travel limit block 14 is provided on the core 5 to limit the sliding travel of the large slider 8. At this time, it is convenient for better demoulding and can also prevent the large slider 7 from sliding outward too much to affect the reset of the mold.
[0029] In this embodiment, wear-resistant plates 15 are provided between the large slider 7 and the core 5, between the downhill small slider 9 and the core 5, between the large slider 7 and the uphill small slider 8, and between the large slider 7 and the downhill small slider 9. The provision of the wear-resistant plates 15 can reduce the friction between the components, reduce friction loss, and extend their service life. In the later maintenance, only the wear-resistant plates 15 need to be replaced, which is simple to operate and has low maintenance cost.
[0030] In this embodiment, a strip slide groove is provided at the bottom of the large slider 7, and correspondingly, a strip slider 16 that slides with the strip slide groove is fixed to the core 5 by bolts. The cooperation between the strip slider 16 and the strip slide groove can prevent the large slider 7 from being displaced when it moves. Furthermore, two inclined guide pillars 10 are provided in the three-layer slider disengagement mechanism, and the two inclined guide pillars 10 are distributed on both sides of the strip slide groove. In this way, it can be ensured that the large slider 7 is evenly stressed, and further prevented from being displaced.
[0031] In this embodiment, the core 5 is fixed with a first pressing plate 17, a second pressing plate 18 and a third pressing plate 19 by bolts, and correspondingly, the large slider 7, the small uphill slider 8 and the small downhill slider 9 are respectively provided with a first limiting step 71, a second limiting step 81 and a third limiting step 91 which cooperate with the first pressing plate 17, the second pressing plate 18 and the third pressing plate 19 to form a limiting position. In this way, it can be ensured that the large slider 7 and the small uphill and downhill sliders can only move in one direction (i.e., relative to each other). Figure 2 The state that the small slider can only slide left and right but cannot slide up and down or forward and backward) can prevent the phenomenon that the small slider up and downhill falls when being pulled by the large slider 7.
[0032] In this embodiment, two three-layer slider undercut removal mechanisms are arranged between the cavity 4 and the core 5. Thus, it can be applied to injection molded products with many undercuts inside.
[0033] When the plastic product is cooled after injection molding, the cavity 4 moves up to open the mold, and drives the inclined guide column 10 to move up. The inclined guide column 10 supports the large slider 7 to provide an outward thrust, so that the large slider 7 slides outward along the core 5. At the same time, the uphill small slider 8 and the downhill small slider 9 slide outward together under the pull of the large slider 7 to disengage from the undercut; when the large slider 7 slides to contact the travel limit block 14 and stops moving, the internal undercuts on the plastic product have been completely demolded; the injection mold ejects the product, and when the product is completely ejected, the robot takes the product away; then, the injection mold reverses the above movement and resets, and the large slider 7 returns to its original position under the push of the inclined guide column 10, completing the mold closing and starting the next injection molding.
[0034] The above general description of the utility model involved in this application and the description of its specific implementation method should not be understood as limiting the technical solution of the utility model. Based on the disclosure of this application, those skilled in the art can add, reduce or combine the disclosed technical features in the above general description or / and the specific implementation method (including examples) without violating the constituent elements of the utility model involved, to form other technical solutions within the scope of protection of this application.
Claims
1. An injection mold, comprising an upper composite plate (1) and a lower composite plate (2), and a hot runner plate (3), a cavity (4), a core (5) and a mold foot (6) arranged between the upper composite plate (1) and the lower composite plate (2); characterized in that: A three-layer slider disengaging mechanism is provided between the mold cavity (4) and the mold core (5); the three-layer slider disengaging mechanism comprises a large slider (7), an uphill small slider (8), a downhill small slider (9) and an inclined guide column (10); the large slider (7) is slidably connected to the mold core (5); the uphill small slider (8) and the downhill small slider (9) are distributed up and down and are located on the inner side of the large slider (7), and the inner side surfaces of the uphill small slider (8) and the downhill small slider (9) are respectively abutted against the outer side surface of the insert (11) to form a limit; the insert (11) is fixed on the large slider (7); one end of the inclined guide column (10) is fixed on the mold cavity (4), and the other end is inserted into the through hole on the large slider (7) to form a sliding pair.
2. The injection mold according to claim 1, characterized in that: A spring (12) is provided inside the large slider (7); the spring (12) is sleeved on a guide post (13), and the guide post (13) is slidably connected to the large slider (7); one end of the spring (12) is fixed to a limiting boss inside the large slider (7), and the other end is fixed to a limiting head (131) at the end of the guide post (13); when the injection mold is closed, the spring (12) is in a compressed state.
3. The injection mold according to claim 1, characterized in that: The core (5) is provided with a travel limit block (14) for limiting the sliding travel of the large slide block (7).
4. The injection mold according to claim 1, characterized in that: Wear-resistant plates (15) are provided between the large slider (7) and the core (5), between the downhill small slider (9) and the core (5), between the large slider (7) and the uphill small slider (8), and between the large slider (7) and the downhill small slider (9).
5. The injection mold according to claim 1, characterized in that: The bottom of the large slider (7) is provided with a strip-shaped slide groove, and correspondingly, the core (5) is provided with a strip-shaped slider (16) that slidably cooperates with the strip-shaped slide groove.
6. The injection mold according to claim 5, characterized in that: Two inclined guide pillars (10) are provided in the three-layer slide block disengaging and buckling mechanism, and the two inclined guide pillars (10) are distributed on both sides of the strip-shaped slide groove.
7. The injection mold according to claim 1, characterized in that: A first pressing plate (17), a second pressing plate (18) and a third pressing plate (19) are fixed on the core (5); correspondingly, the large slider (7), the small uphill slider (8) and the small downhill slider (9) are respectively provided with a first limiting step (71), a second limiting step (81) and a third limiting step (91) which cooperate with the first pressing plate (17), the second pressing plate (18) and the third pressing plate (19) to form a limiting position.
8. The injection mold according to claim 1, characterized in that: Two three-layer slider undercutting mechanisms are arranged between the mold cavity (4) and the mold core (5).
9. The three-layer slider of the injection mold is equipped with an undercut mechanism, which is characterized by: The invention comprises a large slider (7), an uphill small slider (8), a downhill small slider (9) and an inclined guide column (10); the large slider (7) is slidably connected to the core (5); the uphill small slider (8) and the downhill small slider (9) are distributed up and down and are located on the inner side of the large slider (7), and the inner side surfaces of the uphill small slider (8) and the downhill small slider (9) respectively abut against the outer side surface of the insert (11) to form a limit; the insert (11) is fixed on the large slider (7); one end of the inclined guide column (10) is fixed on the cavity (4), and the other end is inserted into the through hole on the large slider (7) to form a sliding pair.
10. The three-layer slider release and buckle mechanism for injection mold according to claim 9, characterized in that: A spring (12) is provided inside the large slider (7); the spring (12) is sleeved on a guide post (13), and the guide post (13) is slidably connected to the large slider (7); one end of the spring (12) is fixed to a limiting boss inside the large slider (7), and the other end is fixed to a limiting head (131) at the end of the guide post (13); when the injection mold is closed, the spring (12) is in a compressed state.