Secondary sliding block sequence control mechanism
By introducing a sequence control mechanism and a limit locking mechanism into the secondary slider mechanism, the mold and machine tool problems caused by the complex slider movement sequence are solved, achieving efficient and compact control of the slider and reducing production costs and defect rates.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- PERLMAN ELECTRICAL KUSN
- Filing Date
- 2025-04-11
- Publication Date
- 2026-04-28
AI Technical Summary
In existing technologies, the control of the secondary slider movement sequence is complex, resulting in large mold size, limited machine selection, high production defect rate, and the need to increase the investment in machines and personnel.
Two sliders are connected by a sequential mechanism, and the sliders are driven to move sequentially by a hydraulic cylinder. Combined with limit and locking mechanisms, the sequential control of the sliders is achieved.
It achieves sequential movement control of the slider, avoids damage to the barbs, has a compact structure, strong applicability, reduces the requirements for molds and machine tools, and improves production efficiency.
Smart Images
Figure CN224170366U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of secondary sliders, and in particular to a secondary slider sequence control mechanism. Background Technology
[0002] Plastic products are widely used in daily life, and each plastic product corresponds to a set of molds. Production is achieved through the cooperation of the mold and an injection molding machine. Plastic products are diverse, and depending on their different functions and uses, they often exhibit various undercut features (such as various snap-fit features, or products with zero-degree corners that cannot be properly demolded). These undercut features typically require a sliding block mechanism designed into the plastic mold for demolding. For some products with simple undercut structures, demolding can be achieved with a single sliding block movement. For more complex undercut structures, a secondary sliding block movement is required. The sequence of the secondary sliding block movements during mold opening is crucial; an incorrect sequence can result in failure to demold or even mold collision. Therefore, controlling the movement sequence of the secondary sliding blocks in an injection mold is extremely important.
[0003] For a structure where the secondary slider moves in a first-open-first-close (synchronous mold closing) sequence, the mold structure is simple, requiring only inclined guide pillars and clearance holes. For a structure where the secondary slider moves in a first-open-then-close sequence, the mold structure becomes more complex. In this case, the mold must have two independent sets of hydraulic or pneumatic cylinders to control the movement sequence of the secondary sliders separately. Molds designed with this structure will be correspondingly larger (because the arrangement of hydraulic or pneumatic cylinders occupies space). For example, a product requires a set of secondary slider structures. For a two-cavity mold design, four independent hydraulic or pneumatic cylinders are needed on the mold. This presents several serious problems: 1. The mold size is very large, requiring a larger machine to accommodate it. 2. Standard injection molding machines typically only have two independent hydraulic cylinder control systems on the mold side. In this case, either an investment in upgrading the injection molding machine's hydraulic control system is needed, or all slider cylinders must be connected in series for normal production. (A major drawback of connecting all slider cylinders in series is that when the hydraulic control system alarms during production, it's impossible to determine which slider is malfunctioning.) 3. Larger machines have larger injection volumes, but if the product size is small and the injection volume is much smaller than the machine's, the raw material is prone to carbonization in the machine's barrel, resulting in uneven filling and difficulty in dimensional adjustment. The primary condition for improving these molding problems is to select a suitable machine based on the product size and injection volume, and the mold design dimensions must also match the selected machine.
[0004] If the mold uses independent hydraulic or pneumatic cylinders to control the movement sequence of a set of secondary slides, the mold size may be too large to match the machine, making mold setup impossible. The only solution is to reduce the number of cavities in the mold to decrease its size and fit the machine. However, this cannot guarantee customer demand, necessitating the development of more molds, machines, and personnel to increase production capacity. This increases investment costs, and labor and maintenance costs will also rise accordingly. Utility Model Content
[0005] The purpose of this utility model is to provide a secondary slider sequential control mechanism, in which two sliders are connected by a sequential mechanism, and a hydraulic cylinder is connected to one of the sliders, so as to realize the sequential movement of the two sliders in conjunction with the sequential mechanism.
[0006] To solve the above technical problems, the following technical solution is adopted:
[0007] In a first aspect, this utility model provides a secondary slider sequence control mechanism, including a slider and a hydraulic cylinder. The hydraulic cylinder drives the slider to move. The slider includes a first slider and a second slider. The ends of the first slider and the second slider are provided with slider inserts. The slider inserts are used for barbs on the molded product. The hydraulic cylinder is connected to the first slider. The first slider is connected to the second slider through a sequence mechanism.
[0008] The sequential mechanism includes a limiting mechanism and a locking mechanism. The limiting mechanism is used to lock the second slider during one stroke, and the locking mechanism is used to lock the first slider and the second slider together during a second stroke.
[0009] The first stroke involves the hydraulic cylinder driving the first slider to move, and the second stroke involves the hydraulic cylinder driving the first slider and the second slider to move together. After the first stroke is completed, the limiting mechanism releases the lock on the second slider, while the locking mechanism locks the first slider and the second slider together.
[0010] Optionally, the first slider is located in the grooved guide rail on the second slider, the slider inlet of the second slider is divided into two parts that are spaced apart vertically, the slider inlet of the first slider is located between the two parts that are spaced apart vertically, and a long strip-shaped stop block through hole is provided on the grooved guide rail. The stop block through hole is used to make the limiting mechanism act on the first slider through the limiting mechanism.
[0011] During the single stroke, the first slider moves within the grooved guide rail.
[0012] Optionally, the slider insert of the first slider is provided with a first T-shaped portion, and the slider insert of the second slider is provided with a second T-shaped portion. When the slider insert of the first slider is located between the two parts of the slider insert of the second slider, the first T-shaped portion and the second T-shaped portion are in contact.
[0013] During one stroke of the mold opening process, the first T-shaped part on the slider insert of the first slider drives the upper part of the slider insert of the second slider to move downward and the lower part to move upward, causing the slider insert of the second slider to disengage from the barb on the product.
[0014] Optionally, the second slider is located in the grooved guide rail on the first slider. The slider inlet of the first slider is divided into two parts that are spaced apart vertically. The slider inlet of the second slider is located between the two parts that are spaced apart vertically. A long strip-shaped stop block through hole is provided on the grooved guide rail. The stop block through hole is used to make the limiting mechanism act on the second slider through the limiting mechanism.
[0015] During the first stroke, the first slider is driven by the hydraulic cylinder, and the second slider moves relative to the first slider within the grooved guide rail.
[0016] Optionally, the cylinder rod of the hydraulic cylinder is connected to the end of the first slider away from the slider insert.
[0017] Optionally, the limiting mechanism includes a stop block, a spring, a spring fixing seat, a groove inclined surface disposed at the bottom of the first slider, and a limiting groove disposed at the bottom of the second slider. The stop block is provided with a protruding inclined surface that cooperates with the groove inclined surface and a limiting protrusion that cooperates with the limiting groove. The spring is disposed in the spring fixing seat, and one end of the stop block is disposed in the spring fixing seat.
[0018] After the first slider moves one stroke, the stop block is pressed down, the protruding inclined surface disengages from the groove inclined surface, the limiting protrusion disengages from the limiting groove, and the locking of the second slider is released.
[0019] Optionally, the spring mounting base is further provided with a guide block, which is used to guide the movement of the stop block.
[0020] Optionally, the locking mechanism includes a limiting block, a pressure bar, a first groove on the pressure bar, a second groove on the first slider, and a third groove on the second slider, wherein the pressure bar is installed on both sides of the slider;
[0021] When the first slider makes one stroke, one end of the limiting block is located in the first groove, and the other end is located in the second groove or the third groove.
[0022] When the first slider makes a second stroke, the two ends of the limiting block are located in the second groove and the third groove, respectively.
[0023] Optionally, it also includes a male mold core, a male mold plate, an upper ejector plate, a lower ejector plate, and a lower mold fixing plate. The product is disposed on the male mold core. The male mold core, the sequential mechanism, and the slider are all mounted on the male mold plate. A wear-resistant block is provided between the slider and the male mold plate. The male mold plate is mounted on the lower mold fixing plate. An ejector plate is also provided between the male mold plate and the lower mold fixing plate. The ejector plate is connected to an ejector mechanism, which is used to eject the product.
[0024] Wherein, S4 is greater than or equal to S3.
[0025] Compared with the prior art, the beneficial effects achieved by this utility model are as follows:
[0026] 1. This utility model achieves sequential control of the first and second sliders by setting a sequential mechanism. It uses a hydraulic cylinder to drive the two sliders to move sequentially. The sequential movement of the sliders avoids damage to the barbs on the product. The overall structure of this utility model is small and highly applicable.
[0027] 2. This utility model has two different installation methods, using two sliders of different sizes. For different installation methods, the structure of the sequence mechanism is slightly modified to realize the sequential movement of the sliders of different sizes. The sequential movement of the sliders is adapted to the production of barbs on the product. Attached Figure Description
[0028] Figure 1 This is one of the top view structural schematic diagrams of the secondary slider sequence mechanism provided by this utility model;
[0029] Figure 2 This is the second top view schematic diagram of the secondary slider sequence mechanism provided by this utility model;
[0030] Figure 3 This is the third top view schematic diagram of the secondary slider sequence mechanism provided by this utility model;
[0031] Figure 4 This is one of the side cross-sectional structural schematic diagrams of the secondary slider sequence mechanism provided by this utility model;
[0032] Figure 5 This is the second side sectional view of the secondary slider sequence mechanism provided by this utility model.
[0033] Figure 6 This is a sequential structural breakdown diagram of installation method 1 provided by this utility model;
[0034] Figure 7 This is a schematic diagram of the installation method 1 provided by this utility model when the stop block does not lock the second slider;
[0035] Figure 8This is a schematic diagram of the stop block locking the second slider in installation method 1 provided by this utility model;
[0036] Figure 9 This is a schematic diagram of the installation structure of the two slider inserts for installation method 1 provided by this utility model;
[0037] Figure 10 This is a sequential structural breakdown diagram of installation method 2 provided by this utility model;
[0038] Figure 11 This is a schematic diagram of the second installation method provided by this utility model when the stop block does not lock the second slider;
[0039] Figure 12 This is a schematic diagram of the stop block locking the second slider in installation method 2 provided by this utility model.
[0040] Explanation of reference numerals in the attached drawings: 1. First slider; 2. Second slider; 3. First slider insert; 31. First T-shaped part; 4. Second slider insert; 41. Second T-shaped part; 5. Limiting mechanism; 51. Stop block; 52. Spring; 53. Spring fixing seat; 54. Groove slope; 55. Protruding slope; 56. Guide block; 57. Bottom wear-resistant block; 6. Locking mechanism; 61. Limiting block; 62. Pressure strip; 63. First groove; 64. Second groove; 65. Third groove; 7. Male mold core; 8. Male mold plate; 9. Upper ejector plate; 10. Lower ejector plate; 11. Lower mold fixing plate; 12. Stop block through hole; 13. First stroke S1; 14. Second stroke S2; 15. Product; 16. Hydraulic cylinder; 17. Hydraulic cylinder pull rod; 18. Stop block height stop S3; 19. Stop block stroke S4. Detailed Implementation
[0041] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use.
[0042] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 based on the specific circumstances. Example 1
[0043] This embodiment provides a secondary slider sequence control mechanism, including a slider and a hydraulic cylinder 16. The hydraulic cylinder 16 drives the slider to move. The slider includes a first slider 1 and a second slider 2. The ends of the first slider 1 and the second slider 2 are provided with slider inserts. The slider inserts are used for barbs on the molded product 15. The hydraulic cylinder 16 is directly connected to the first slider 1. The first slider 1 is connected to the second slider 2 through a sequence mechanism.
[0044] The sequence mechanism includes a limiting mechanism 5 and a locking mechanism 6. The limiting mechanism 5 is used to lock the second slider 2 during the first stroke, and the locking mechanism 6 is used to lock the first slider 1 and the second slider 2 together during the second stroke.
[0045] In the first stroke, the hydraulic cylinder 16 drives the first slider 1 to move, and in the second stroke, the hydraulic cylinder 16 drives the first slider 1 and the second slider 2 to move together. After the first stroke is completed, the limiting mechanism 5 releases the lock on the second slider 2, and the locking mechanism 6 locks the first slider 1 and the second slider 2 together.
[0046] like Figure 4As shown, product 15 is set on male mold core 7. Male mold core 7 and sequential mechanism are both installed on male mold plate 8. Male mold plate 8 is connected to lower mold fixing plate 11. Upper ejector plate 9 and lower ejector plate 10 are also provided between male mold plate 8 and lower mold fixing plate 11. Upper ejector plate 9 and lower ejector plate 10 are used to install ejector mechanism. Ejector mechanism is used to eject product 15.
[0047] like Figure 1 , Figure 2 As shown, the sequential control mechanism for the secondary slider provided in this embodiment has two installation methods, namely installation method 1 and installation method 2.
[0048] like Figure 1 , Figure 2 , Figure 3 , Figure 4 The structure shown on the right side illustrates installation method 1. The second slider 2 is larger than the first slider 1. The first slider 1 is embedded in the second slider 2. The hydraulic cylinder 16 passes through the end of the second slider 2 and connects to the end of the first slider 1. After the hydraulic cylinder 16 drives the first slider 1 to move a certain distance, it releases the limiting mechanism 5 at the bottom of the second slider 2. Simultaneously, the locking mechanism 6 locks the first slider 1 and the second slider 2 together. The hydraulic cylinder 16 continues to drive, and the first slider 1 and the second slider 2 move together. This allows the slider inserts on the first slider 1 and the second slider 2 to disengage from the barbs of the product 15 sequentially, preventing damage to the barbs during demolding.
[0049] like Figure 1 , Figure 2 The structure shown on the left side illustrates installation method 2. The first slider 1 is larger than the second slider 2, and the second slider 2 is embedded in the first slider 1. The hydraulic cylinder 16 is connected to the end of the first slider 1. The hydraulic cylinder 16 first drives the first slider 1 to move. At this time, the second slider 2 is locked by the bottom limiting mechanism 5. After the first slider 1 moves a certain distance, it presses down the limiting mechanism 5, releasing the locking effect on the second slider 2. Simultaneously, the locking mechanism 6 locks the first slider 1 and the second slider 2 together. The hydraulic cylinder 16 then drives the first slider 1 and the second slider 2 to move together. The slider inserts at the ends of the first slider 1 and the second slider 2 away from the hydraulic cylinder 16 disengage from the barbs of the product 15 one after another, preventing damage to the barbs during demolding.
[0050] For two different installation methods and the design of the slider insert shape based on the shape of the barb, different shapes of barbs on product 15 can be accommodated. When the first slider 1 is a large slider, the large slider detaches from the barb on product 15 first, and the small slider supports the barb on product 15, preventing the product from sticking or sliding when the large slider opens the mold. This is suitable for deep ribs and pillar barbs. When the first slider 1 is a small slider, the small slider detaches from the slider insert of the large slider first, thereby causing the slider insert of the large slider to detach from the barb on product 15. This is suitable for barbs in two (or more) locations. The two installation methods use barbs of different shapes and distributions, thereby improving the applicability of the mechanism. Example 2
[0051] This embodiment provides a secondary slider sequence control mechanism and installation method 1 based on Embodiment 1.
[0052] like Figure 2 , Figure 5 , Figure 6 As shown, the first slider 1 is a small slider with a first slider insert 3 at its end, and the second slider 2 is a large slider with a second slider insert 4 at its end. The second slider 2 has a grooved guide rail for mounting the first slider 1; the grooved guide rail extends to the end of the second slider insert 4, dividing the second slider 2 into two spaced-apart parts. The first slider 1 is embedded in the grooved guide rail, and the first slider insert 3 is located between the two spaced-apart parts of the second slider insert 4.
[0053] like Figure 9 As shown, the first slider insert 3 has a first T-shaped part 31 on both sides, and the second slider insert 4 has a second T-shaped part 41 on both sides. When the first slider insert 3 is located between the two parts of the second slider insert 4, the first T-shaped parts 31 on both sides and the second T-shaped parts 41 make contact with each other. The first T-shaped part 31 on one side is embedded in the lower part of the second slider insert 4, and the first T-shaped part 31 on the other side is embedded in the upper part of the second slider insert 4. The second T-shaped parts 41 on both sides are embedded in the first slider insert 3. The first T-shaped part 31 is embedded in one side of the lower part, and the second T-shaped part 41 is located above the first T-shaped part 31. The first T-shaped part 31 is embedded in one side of the upper part, and the second T-shaped part 41 is located below the first T-shaped part 31.
[0054] During the first stroke of the mold opening process, the first slider moves away from the product. When the first slider insert 3 moves, it causes the first T-shaped part 31 on it to disengage from the second slider insert 4. During the disengagement process, the first T-shaped part 31 on one side causes the lower part of the second slider insert 4 to move upward, so that the lower part of the second slider insert 4 disengages from its bottom barb. The first T-shaped part 31 on the other side causes the lower part of the second slider insert 4 to move downward, so that the upper part of the second slider insert 4 disengages from its top barb. This allows the second slider to disengage from the barb of the product first, avoiding product sticking to the film during the first demolding.
[0055] like Figure 6 , Figure 7 , Figure 8 As shown, the limiting mechanism 5 includes a stop block 51, a spring 52, and a spring fixing seat 53. The end of the stop block 51 has a protruding inclined surface 55, and the bottom of the first slider 1 has a grooved inclined surface 54. A long, narrow stop block through hole 12 extending through to the bottom of the second slider 2 is provided at the bottom of the groove guide rail. When the second slider 2 moves, it does not affect the stop block 51 passing through the stop block through hole 12 and acting on the first slider 1. One end of the stop block 51 is located inside the spring fixing seat 53, and the end with the protruding inclined surface 55 passes through the stop block through hole 12 and acts on the first slider 1. Limiting protrusions are provided on both sides of the stop block 51, and a limiting groove is provided at the bottom of the second slider 2. The two limiting grooves are located on both sides of the stop block through hole 12. When the second slider 2 is locked, the grooved inclined surface 54 engages with the protruding inclined surface 55, and the limiting protrusions engage with the limiting grooves. When the second slider 2 is released from locking, they disengage from each other.
[0056] like Figure 2 , Figure 5 , Figure 8 As shown, after the first slider 1 completes one stroke S113, the protruding inclined surface 55 disengages from the groove inclined surface 54. The protruding inclined surface 55 is located on the flat part at the bottom of the first slider 1. The flat part at the bottom of the first slider 1 presses down the stop block 51. The stop block 51 is located at one end of the spring fixing seat 53 and is connected to the spring 52. After the stop block 51 is pressed down, it compresses the spring 52. The limiting protrusion disengages from the limiting groove at the bottom of the second slider 2.
[0057] After the limiting protrusion engages with the limiting groove, it stops the second slider 2 at a height of S318 (the height of the limiting protrusion within the limiting groove). The moving height of the protruding inclined surface 55 from the groove inclined surface 54 to the flat part at the bottom of the second slider 2 is the stop block stroke S419. The stop block height S318 is less than or equal to the stop block stroke S419.
[0058] A bottom wear-resistant block 57 is also provided at the bottom of the second slider 2. The stop block 51 is set through the bottom wear-resistant block 57. A guide block 56 is provided on the open end of the spring fixing seat 53. The guide block 56 is sleeved on the stop block 51 and is located below the bottom wear-resistant block 57. The guide block 56 is used to guide the stop block 51 when it moves. The bottom wear-resistant block 57 has wear-resistant properties. When the second slider 2 moves, it rubs against the bottom wear-resistant block 57, which improves the durability of the device.
[0059] The locking mechanism 6 includes a limiting block 61 and pressure strips 62. There are two pressure strips 62, which are respectively installed on both sides of the second slider 2. A first groove 63 is formed on the side wall of the pressure strip 62 near the second slider 2. A third groove 65 is formed on both side walls of the groove guide rail of the second slider 2, extending to the outer side wall. A second groove 64 is formed on both side walls of the first slider 1 near the groove guide rail. The first groove 63, the second groove 64, and the second groove 65 are at the same height and are all slightly larger than the limiting block 61. The limiting block 61 is located in different grooves to lock and release the first slider 1 and the second slider 2.
[0060] Specifically, when the first slider 1 is in one stroke S113, the two ends of the limiting block 61 are located in the first groove 63 and the third groove 65 respectively. After the first slider 1 completes one stroke S113, the three grooves are aligned, one end of the limiting block 61 disengages from the first groove 63 and enters the second groove 64, and the other end enters the second groove 64, locking the first slider 1 and the second slider 2.
[0061] The cylinder rod 17 on the cylinder 16 passes through the end of the second slider 2 and enters the grooved guide rail, where it connects with the first slider 1 inside the grooved guide rail.
[0062] During mold opening, the limiting groove at the bottom of the second slider 2 engages with the limiting protrusion on the stop block 51. The height of the limiting protrusion within the limiting groove is such that the stop block is stopped at a height S318, restricting the movement of the second slider 2. The first slider 1 is driven by the hydraulic cylinder 16 at its end to move one stroke S113 away from the product 15. The protruding inclined surface 55 on the stop block 51 gradually moves out of the groove inclined surface 54. When the first slider 1 completes one stroke S113, the protruding inclined surface 55 completely disengages from the groove inclined surface 54 and is located on the flat part at the bottom of the first slider 1. At the same time, the stop block 51 is pressed down, and the limiting protrusion disengages from the limiting groove. Simultaneously, the first groove 63, the second groove 64, and the third groove 65 align. One end of the limiting block 61 disengages from the first groove 63 and is located within the third groove 65, while the other end enters the second groove 64, locking the first slider 1 and the second slider 2. The first slider 1 moves to the tail end of the groove guide rail, and the end face of the first slider 1 connected to the hydraulic cylinder rod 17 contacts the inner end face of the groove guide rail. The hydraulic cylinder 16 continues to pull the first slider 1 to move a second stroke S214 away from the product 15. Since the end face of the first slider 1 is in contact with the inner end face of the groove guide rail, the second slider 2 moves along with the first slider 1 while the first slider 1 is being pulled, until the end face of the second slider 2 contacts the end face of the hydraulic cylinder 16, completing the second stroke S214. The first slider insert 3 and the second slider insert 4 completely disengage from the product 15, completing the demolding of the barbs on the product 15.
[0063] During mold closing, the limiting block 61 is located in the second groove 64 and the third groove 65, locking the first slider 1 and the second slider 2. When the oil cylinder 16 pushes the first slider 1 to move closer to the product 15, the second slider 2 moves with the first slider 1. When the first slider 1 and the second slider 2 complete the reset secondary stroke S214, the second slider insert 4 is in place, and the first groove 63, the second groove 64 and the third groove 65 are aligned. At the same time, the protruding inclined surface 55 on the stop enters the groove inclined surface 54 at the bottom of the first slider 1. The limiting protrusions on both sides of the stop are aligned with the limiting groove at the bottom of the second slider 2 and enter the limiting groove to lock the second slider 2. When the hydraulic cylinder 16 continues to push the first slider 1 to move closer to the product 15, one end of the limiting block 61 disengages from the second groove 64, and the other end enters the first groove 63. The hydraulic cylinder 16 drives the first slider 1 to continue moving towards the product 15 independently along the groove guide rail of the second slider 2. When it moves to the farthest distance set by the hydraulic cylinder 16, the first slider insert 3 is in place, completing one reset stroke S113.
[0064] In this embodiment, the first stroke S113 is 30mm and the second stroke S214 is 20mm. Example 3
[0065] This embodiment provides a secondary slider sequence control mechanism and installation method 2 based on embodiment 1.
[0066] like Figure 10 , Figure 11 , Figure 12 As shown, the first slider 1 is a large slider with a first slider insert 3 at its end, and the second slider 2 is a small slider with a second slider insert 4 at its end. The first slider 1 has a grooved guide rail, and the second slider 2 is embedded within this grooved guide rail. The first slider insert 3 is divided into two spaced-apart parts by the grooved guide rail. After the second slider 2 is embedded in the grooved guide rail, the first slider insert 3 is located between the two separated parts of the second slider insert 4. The end of the first slider 1 is connected to the hydraulic cylinder pull rod 17.
[0067] The limiting mechanism 5 includes a stop block 51, a spring 52, and a spring fixing seat 53. The stop block 51 has raised inclined surfaces 55 on both sides, and the bottom of the first slider 1 has a grooved inclined surface 54. The bottom of the grooved guide rail also has a stop block through hole 12 that extends to the bottom of the first slider 1. The grooved inclined surface 54 is located on both sides of the stop block through hole 12. One end of the stop block 51 is installed in the spring fixing seat 53, and the other end passes through the stop block through hole 12 and cooperates with the limiting groove at the bottom of the second slider 2, thereby locking the second slider 2. The stop block 51 is located at one end of the spring fixing seat 53 and contacts the spring 52. When the first slider 1 is driven by the oil cylinder 16, the raised inclined surface 55 moves in the grooved inclined surface 54 until it moves out of the grooved inclined surface 54, pressing down the stop block 51. The end of the stop block 51 disengages from the limiting groove of the second slider 2, releasing the locking of the second slider 2.
[0068] like Figure 2 , Figure 5 , Figure 12 As shown, during the first slider 1's one-stroke S113 movement, the stop block 51 locks the second slider 2. After completing one stroke S113, the first slider 1 releases the stop block 51, and the first slider 1 and the second slider 2 continue to move together for a second stroke S214. The distance at which one end of the stop block 51 is located within the limiting groove is the stop block height S318. During the process of the protruding inclined surface 55 moving out of the groove inclined surface 54, the downward pressing distance of the stop block 51 is the stop block stroke S419. The stop block height S318 is less than or equal to the stop block stroke S419, ensuring that the locking effect on the second slider 2 can be completely released.
[0069] The locking mechanism 6 includes a limiting block 61 and pressure strips 62. Two pressure strips 62 are respectively disposed on both sides of the first slider 1. A first groove 63 is formed on the side of the pressure strip 62 closest to the first slider 1. The first groove 63 has a certain length. Second grooves 64 are formed on both sides of the first slider 1, extending from the opening of the groove guide sidewall to the outer wall. Third grooves 65 are formed on both side walls of the second slider 2. The length of the third groove 65 is less than that of the first groove 63. The lengths of the second groove 64 and the third groove 65 are slightly greater than the width of the limiting block 61. By changing the position of the limiting block 61 among the three grooves, the locking and unlocking of the first slider 1 and the second slider 2 are achieved.
[0070] The bottom of the first slider 1 is also provided with a bottom wear-resistant block 57, and a stop block 51 is set through the bottom wear-resistant block 57. A guide block 56 is also sleeved on the stop block 51, and the guide block 56 is located below the bottom wear-resistant block 57. The spring fixing seat 53 and the bottom wear-resistant block 57 are both installed on the male template 8.
[0071] During mold opening, the first slider insert 3 and the second slider insert 4 form the barbs on the product 15. The hydraulic cylinder 16 pulls the first slider 1 to move away from the product 15 for one stroke S113. During one stroke S113, the end of the stop block 51 is located in the limiting groove at the bottom of the second slider 2, locking the second slider 2. The raised inclined surfaces 55 on both sides of the stop block 51 are located in the grooved inclined surface 54 at the bottom of the first slider 1. As the first slider 1 moves, the raised inclined surfaces 55 gradually disengage from the grooved inclined surface 54, and the stop block 51 is gradually pressed down. After one stroke S113 is completed, the raised inclined surfaces 55 completely disengage from the grooved inclined surface 54 and are located on the flat part at the bottom of the first slider 1. The stop block 51 is pressed down in the vertical direction for a stroke S419, and the end of the stop block 51 completely disengages from the limiting groove at the bottom of the second slider 2, releasing the lock on the second slider 2. Simultaneously, the limiting block 61 is moved to the end of the first groove 63 by the first slider 1, and the first groove 63, the second groove 64 and the third groove 65 are aligned. Since the limiting block 61 has moved to the end of the first groove 63, after the first slider 1 and the second slider 2 continue to move, the first groove 63 has no space to accommodate the limiting block 61. The limiting block 61 is squeezed into the third groove 65, locking the first slider 1 and the second slider 2 together. At this time, the end face of the second slider 2 is close to the end face of the groove guide rail. The oil cylinder 16 pulls the first slider 1 and the second slider 2 together to move away from the product 15 for a second stroke S214.
[0072] During mold closing, the first slider 1 and the second slider 2 move together toward the product 15, resetting the second stroke S214. Then, the stop block 51 locks the second slider 2, and the limit block 61 is located in the first groove 63 and the second groove 64. The first slider 1 continues to move toward the product 15, resetting the first stroke S113.
[0073] In this embodiment, the first stroke S113 is 30mm and the second stroke S214 is 20mm.
[0074] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.
Claims
1. A secondary slider sequence control mechanism, comprising a slider and a hydraulic cylinder, wherein the hydraulic cylinder drives the slider to move, characterized in that, The slider includes a first slider and a second slider. Both the first slider and the second slider are provided with slider inserts at their ends. The slider inserts are used for barbs on the molded product. The hydraulic cylinder is connected to the first slider. The first slider is connected to the second slider through a sequential mechanism. The sequential mechanism includes a limiting mechanism and a locking mechanism. The limiting mechanism is used to lock the second slider during one stroke, and the locking mechanism is used to lock the first slider and the second slider together during a second stroke. The first stroke involves the hydraulic cylinder driving the first slider to move, and the second stroke involves the hydraulic cylinder driving the first slider and the second slider to move together. After the first stroke is completed, the limiting mechanism releases the lock on the second slider, while the locking mechanism locks the first slider and the second slider together.
2. The secondary slider sequence control mechanism according to claim 1, characterized in that, The first slider is located in the grooved guide rail on the second slider. The slider inlet of the second slider is divided into two parts that are spaced apart vertically. The slider inlet of the first slider is located between the two parts that are spaced apart vertically. A long strip-shaped stop block through hole is provided on the grooved guide rail. The stop block through hole is used to make the limiting mechanism act on the first slider through the limiting mechanism. During the single stroke, the first slider moves within the grooved guide rail.
3. The secondary slider sequence control mechanism according to claim 2, characterized in that, The first slider has a first T-shaped part on its slider insert, and the second slider has a second T-shaped part on its slider insert. When the slider insert of the first slider is located between the two parts of the slider insert of the second slider, the first T-shaped part and the second T-shaped part make contact with each other. During one stroke of the mold opening process, the first T-shaped part on the slider insert of the first slider drives the upper part of the slider insert of the second slider to move downward and the lower part to move upward, causing the slider insert of the second slider to disengage from the barb on the product.
4. The secondary slider sequence control mechanism according to claim 1, characterized in that, The second slider is located in the grooved guide rail on the first slider. The slider inlet of the first slider is divided into two parts that are spaced apart vertically. The slider inlet of the second slider is located between the two parts that are spaced apart vertically. A long strip-shaped stop block through hole is provided on the grooved guide rail. The stop block through hole is used to make the limiting mechanism act on the second slider through the limiting mechanism. During the first stroke, the first slider is driven by the hydraulic cylinder, and the second slider moves relative to the first slider within the grooved guide rail.
5. The secondary slider sequence control mechanism according to claim 1, characterized in that, The cylinder rod of the hydraulic cylinder is connected to the end of the first slider away from the slider insert.
6. The secondary slider sequence control mechanism according to claim 1, characterized in that, The limiting mechanism includes a stop block, a spring, a spring fixing seat, a groove inclined surface provided at the bottom of the first slider, and a limiting groove provided at the bottom of the second slider. The stop block is provided with a protruding inclined surface that cooperates with the groove inclined surface and a limiting protrusion that cooperates with the limiting groove. The spring is provided in the spring fixing seat, and one end of the stop block is provided in the spring fixing seat. After the first slider moves one stroke, the stop block is pressed down, the protruding inclined surface disengages from the groove inclined surface, the limiting protrusion disengages from the limiting groove, and the locking of the second slider is released.
7. The secondary slider sequence control mechanism according to claim 5, characterized in that, The spring mounting base is also provided with a guide block, which is used to guide the movement of the stop block.
8. The secondary slider sequence control mechanism according to claim 1, characterized in that, The locking mechanism includes a limiting block, a pressure bar, a first groove on the pressure bar, a second groove on the first slider, and a third groove on the second slider. The pressure bar is installed on both sides of the slider. When the first slider makes one stroke, one end of the limiting block is located in the first groove, and the other end is located in the second groove or the third groove. When the first slider makes a second stroke, the two ends of the limiting block are located in the second groove and the third groove, respectively.
9. The secondary slider sequence control mechanism according to claim 1, characterized in that, It also includes a male mold core, a male mold plate, an upper ejector plate, a lower ejector plate, and a lower mold fixing plate. The product is disposed on the male mold core. The male mold core, the sequential mechanism, and the slider are all installed on the male mold plate. A wear-resistant block is provided between the slider and the male mold plate. The male mold plate is installed on the lower mold fixing plate. An ejector plate is also provided between the male mold plate and the lower mold fixing plate. The ejector plate is connected to an ejector mechanism, which is used to eject the product.